Exam 4: HESI-A2-Reading
Exam 1: HESI-A2-Chemistry175 Questions
Exam 2: HESI-A2-Math252 Questions
Exam 3: HESI-A2-Vocabulary249 Questions
Exam 4: HESI-A2-Reading326 Questions
Exam 5: HESI-A2-Grammar361 Questions
Exam 6: HESI-A2-Biology165 Questions
Exam 7: HESI-A2-Physics242 Questions
Exam 8: HESI-A2-Anatomy & Physiology314 Questions
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Preventing Heart Disease
Heart disease is a life-threatening condition that kills millions of people every year. In fact, heart disease is the number one killer of human beings worldwide; over thirty percent of deaths every year are due to some form of cardiovascular disease. Although there are many different types of medications and surgical procedures that can treat heart disease, prevention is the most important factor in reducing the number of deaths.
Proper nutrition is important in preventing heart disease. The recommended diet for a healthy heart is low in saturated fats, cholesterol, salt, and refined sugar. The diet should be high in fiber, whole grains, fruits, and vegetables.
Smoking and excessive alcohol consumption should be avoided. Smoking increases the risk for heart disease at least ten-fold, and drinking too much alcohol can raise the levels of some fats in the blood and lead to high blood pressure and increase the risk of cardiovascular damage.
Lack of physical exercise can also make a person more likely to suffer from heart disease. Participating regularly in aerobic exercise, which can include walking, jogging, dancing, or swimming significantly reduces the risk of heart disease.
Another contributor to heart disease is stress. Constant stress can expose your body to persistently elevated levels of the stress hormones cortisol and adrenaline. High levels of these hormones can increase blood pressure and damage artery walls. Engaging in yoga, meditation, or other relaxation techniques can be helpful in reducing stress and lowering the risk for heart disease.
Question: According to the text, what is the relationship between alcohol consumption and fats in the blood?
(Multiple Choice)
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Basketball Ankle Injury Treatments
Basketball players are more likely than any other sports players to injure their ankles. The most common ankle injuries among basketball players are inversion (turning inward) and eversion (turning outward) of the ankle. The sharp twists, frequent running, constant jumping, and sudden stopping associated with basketball put tremendous pressure on a player's ankle joint. The two main ways that players and trainers try to treat and prevent these injuries are taping and bracing.
Taping simply involves wrapping special tape snugly around the ankle joint. Although it is simple to apply, there are some drawbacks. Taping is not very expensive when used once, but when used throughout the season, taping is three times more costly than bracing. Taping also loosens with physical activity; after only ten minutes of exercise, the tape will become 50% looser. After one hour of exercise, taping offers no significant support whatsoever.
Bracing has proven to be more effective than taping in a number of different studies. It is also much more cost effective throughout a season. Several types of ankle braces are available for use, ranging from cloth lace-on braces to more rigid plastic braces. Braces decrease the range of motion of the ankle more than taping does, and, therefore, help to prevent future ankle injuries. However, despite the benefits of ankle braces over ankle tape, many players find that braces restrict movement capabilities and also cause discomfort.
Which word would best replace "tremendous" in paragraph 1?
(Multiple Choice)
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Guide dogs
Guide dogs are service animals that are specially trained to help visually impaired people. Most guide dogs are Labrador Retrievers, Golden Retrievers, or German Shepherds, breeds known for their intelligence, gentleness, and friendliness. Puppies that might become guide dogs are monitored from a very young age by trainers. Puppies that demonstrate a good temperament and willingness to learn begin their training at about 16 months of age.
Puppies that have been selected for training live with their trainer's family for about a year. Trainers teach the puppies to walk in straight lines, avoid obstacles, and stop at curbs. The dog learns how to focus on the owner instead of distractions, such as food, toys, or other animals. Guide dogs learn how to obey their owners, but also when to refuse their owner's commands when it might lead to danger, such as crossing a busy street.
When the dog is full-grown, the trainer brings it in for a final assessment. If the dog passes the test, it is placed with a visually impaired person in need of a service animal. If the dog fails the assessment, however, it often remains as a pet with the trainer's family. Although trainers might be sad to part with the dog that they have bonded with, they know that their former charge has become an invaluable resource for someone in need.
What is NOT included as an aspect of training, based on the text?
(Multiple Choice)
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Dreams
The average adult spends almost two full hours every night dreaming. Dreams mainly occur during a period known as REM (Rapid Eye Movement) sleep. While you are in REM sleep, your brain is very active-almost as active as if you were awake. The fact that we dream most often during REM sleep is one of very few facts about dreams that every scientist agrees on. Scientists do not know exactly which portion of the brain creates dreams or even why we have them in the first place.
One theory about their purpose is that dreaming helps the brain to organize and store memories. As your body relaxes, your brain processes all of the information it received during the day. While you sleep, your brain organizes the information into memories; your mind perceives this process as dreaming. Because your mind works differently when you are asleep than it does when you are awake, your dreams may seem confusing, illogical, or just downright silly.
Another theory is that dreams allow your mind to work out difficult problems that you encounter while you are awake. The unrealistic, free-flowing nature of dreams allows your mind to consider the problems in creative ways that you would likely never think of during your waking hours. Still other scientists believe that dreams are random events with no real function. According to this theory, there is no actual reason for dreaming-it is simply what happens when you go to sleep.
As you can see, there is no scientific consensus about how or why we dream. There are many different theories, but no proven answers. Until then, you might as well just enjoy the fantastic nighttime adventures you get to go on without ever leaving your bed.
Which of the following best describes the author's point of view regarding dreams?
(Multiple Choice)
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Balance
Everyone knows that your ears are responsible for your sense of hearing. But did you also know that your ears are also partially responsible for your sense of balance? Your inner ear contains something called the vestibular system, which is a key component in your body's ability to establish and maintain balance.
The vestibular system mainly consists of three semicircular canals. Each semicircular canal has a different orientation, allowing them to detect a variety of movements. The canals are filled with a fluid called endolymph. When you move your head, the fluid in the canals also moves; this movement sends signals to the brain about the position of your head. Your brain uses this information to help your body stay balanced.
Damage to the vestibular system caused by disease or injury can severely affect a person's balance. Consuming too much alcohol can also temporarily affect the vestibular system. Because alcohol thins the blood, it also changes the viscosity of the endolymph. The thinned-out endolymph sends signals to your brain that your body is rotating even though it is not. This is why many people feel like the room is spinning when they are drunk.
Based on the passage, what can be inferred regarding the functions of the endolymph?
(Multiple Choice)
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Autism and Vaccines
Autism spectrum disorders (ASD) are a range of psychological conditions characterized by challenges with social interaction, behavior, speech, and nonverbal communication. While there is no general consensus among medical professionals about the underlying causes of ASD, theories range from genetic inheritance to environmental factors.
One of the most controversial theories to have emerged in recent times is that ASD could be caused by the MMR [mumps, measles, rubella] vaccine that was first developed in the 1960s. The vaccine is a mixture of three live viruses and is administered via injection to children when they are one year old. By the late 1990s, this vaccination had led to the near-eradication of measles in countries that employed widespread inoculation. However, a combination of spurious scientific data and alarmist media attention led to an entirely preventable resurgence in measles cases in the early 21st century.
The first claims of a connection between the MMR vaccine and autism were made in 1998, when an article in The Lancet, a respected British medical journal, reported on eight cases of autism that could possibly be traced back to the administration of an MMR vaccine.
An onslaught of media coverage followed the publication of this article. The popular press quickly seized upon this story; in 2002, over 1200 articles were written about the link between MMR vaccines and ASD. Less than 30% of these articles, however, mentioned that an overwhelming amount of scientific evidence suggested that these vaccinations were completely safe.
Question: What is the best summary of the passage?
(Multiple Choice)
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Brain Freeze
"Brain Freeze" headaches-known to scientists as sphenopalatine ganglioneuralgia -are most often triggered when cold food or drink comes into contact with the roof of your mouth. In order to discover more about this phenomenon, researchers at Harvard Medical School hooked volunteers up to trans-cranial Dopplers, machines that allow scientists to study blood flow in the brain. The volunteers were then given cups of ice water and instructed to drink it using a straw held right up against the roof of the mouth. The volunteer gave a signal when he or she felt a "brain freeze" headache begin and another signal when it ended.
This experiment allowed the scientists to observe changes in brain blood flow before, during, and after a "brain freeze" headache. The scientists found that when the subjects were experiencing a "brain freeze", the anterior cerebral artery (a major blood vessel in the brain) dilated rapidly. Because the artery becomes wider, more blood flows into the brain. This creates an increase in pressure inside the skull, which is what causes the pain. As soon as the artery shrinks to its normal size, the "brain freeze" headache disappears.
This may explain why "brain freeze" headaches hurt, but it does not tell us why they happen in the first place. Scientists do not yet have any definite answers to this question, but they do have some ideas. One theory suggested by the researchers at Harvard Medical School is that a brain freeze is a way of protecting the brain from cold. When the anterior cerebral artery dilates, it allows a flood of warm blood inside the brain, thus keeping it warm.
Which phrase would best replace 'shrinks' in paragraph 2?
(Multiple Choice)
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Glowing in the Dark
Have you ever wondered how glow-in-the-dark things actually glow in the dark? Most glow-in-the-dark items glow because of something called phosphorescence or photoluminescence. Phosphorescent items must be "charged" under a bright light before they actually glow in the dark. This charging process works because of a substance called phosphor.
When light from the sun or a lamp hits phosphor, the phosphor molecules absorb the light and become energized. As the phosphor molecules release the stored energy, they emit a dim light that is visible in the dark. The color of the light that they produce depends on the color of the dye added to the glow-in-the-dark item. Usually, green dye is added to the phosphors to make the light easier to see. Although any color can be used, the human eye sees green light most clearly in the dark.
There are also a few glow-in-the-dark items that do not need to be charged. Emergency exit signs, gun sights, and certain kinds of expensive wristwatches glow because of radioluminescence. In these items, the phosphor is mixed with a radioactive element called tritium. The radiation from the tritium provides energy to the phosphor. It is almost as if there are thousands of tiny lamps constantly shining on the phosphor. Because their phosphor is always energized, these radioluminescent items are always glowing.
One other kind of glow-in-the-dark item that does not require charging is the glow stick. Glow sticks do not need to be held under light and do not contain any radioactive elements. Instead, glow sticks glow using chemiluminescence. Glow sticks contain a fluorescent dye and a thin glass tube that contains a chemical. To activate a glow stick, you bend the plastic container, causing the glass to break. The chemical inside the glass then mixes with the dye. The combination of the chemical and the dye produces visible light.
Question: What is the main idea of the passage?
(Multiple Choice)
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Dreams
The average adult spends almost two full hours every night dreaming. Dreams mainly occur during a period known as REM (Rapid Eye Movement) sleep. While you are in REM sleep, your brain is very active-almost as active as if you were awake. The fact that we dream most often during REM sleep is one of the very few facts about dreams that every scientist agrees on. Scientists do not know exactly which portion of the brain creates dreams or even why we have them in the first place.
One theory about their purpose is that dreaming helps the brain to organize and store memories. As your body relaxes, your brain processes all of the information it received during the day. While you sleep, your brain organizes the information into memories; your mind perceives this process as dreaming. Because your mind works differently when you are asleep than it does when you are awake, your dreams may seem confusing, illogical, or just downright silly.
Another theory is that dreams allow your mind to work out difficult problems that you encounter while you are awake. The unrealistic, free-flowing nature of dreams allows your mind to consider the problems in creative ways that you would likely never think of during your waking hours. Still, other scientists believe that dreams are random events with no real function. According to this theory, there is no actual reason for dreaming-it is simply what happens when you go to sleep.
As you can see, there is no scientific consensus about how or why we dream. There are many different theories, but no proven answers. Until then, you might as well just enjoy the fantastic nighttime adventures you get to go on without ever leaving your bed.
Question: Which of the following is NOT a theory for why we dream?
(Multiple Choice)
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Synaesthesia
Does the number five smell like lemons? Is the sound of a flute purple? Does the letter "R" taste like cinnamon? These questions might seem strange, but to people with synaesthesia, they make perfect sense.
Synaesthesia is a neurological phenomenon where the senses get crossed. People with synaesthesia (also called "synaesthetes") experience this phenomenon in different ways. The most common form of synaesthesia is called color-graphemic synaesthesia. People who experience this form of synaesthesia associate letters and numbers with certain colors. For example, the letter "A" might always appear to be red and the number eight might always look blue. Another common form of synaesthesia is chromesthesia: the association of sounds with colors. Some people who experience this phenomenon see bursts of color when they hear everyday sounds, such as dogs barking or water dripping. Others associate specific colors with different musical notes.
Although scientists do not yet understand what causes some people to experience synaesthesia, some researchers argue for something called the cross-activation theory. This theory suggests that the regions of the brain responsible for interpreting information from the different senses have become "crossed," that is, the neurons from one sense inadvertently activate the neurons from another sense. There is also evidence to suggest that synaesthesia is a genetic trait. While there is no treatment for synaesthesia, there is also not much demand for a treatment; most synaesthetes report that they find their condition rather pleasant.
Which of the following sentences best expresses the author's opinion regarding synaesthesia?
(Multiple Choice)
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Preventing Heart Disease
Heart disease is a life-threatening condition that kills millions of people every year. In fact, heart disease is the number one killer of human beings worldwide; over thirty percent of deaths every year are due to some form of cardiovascular disease. Although there are many different types of medications and surgical procedures that can treat heart disease, prevention is the most important factor in reducing the number of deaths.
Proper nutrition is important in preventing heart disease. The recommended diet for a healthy heart is low in saturated fats, cholesterol, salt, and refined sugar. The diet should be high in fiber, whole grains, fruits, and vegetables.
Smoking and excessive alcohol consumption should be avoided. Smoking increases the risk for heart disease at least ten-fold, and drinking too much alcohol can raise the levels of some fats in the blood and lead to high blood pressure and increase the risk of cardiovascular damage.
Lack of physical exercise can also make a person more likely to suffer from heart disease. Participating regularly in aerobic exercise, which can include walking, jogging, dancing, or swimming significantly reduces the risk of heart disease.
Another contributor to heart disease is stress. Constant stress can expose your body to persistently elevated levels of the stress hormones cortisol and adrenaline. High levels of these hormones can increase blood pressure and damage artery walls. Engaging in yoga, meditation, or other relaxation techniques can be helpful in reducing stress and lowering the risk of heart disease.
Question: Which of these is NOT listed as a preventative measure in the text?
(Multiple Choice)
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DNA analysis
Modern forensics-science used in investigating crimes-relies heavily on DNA evidence. Nearly every cell in our bodies contains DNA, the molecule that carries our genetic information. Aside from identical twins, no two human beings have the exact same DNA. Because DNA is present in our hair, blood, skin, and saliva, we leave traces of our DNA just about everywhere we go. Forensic investigators collect and analyze DNA evidence left at crime scenes to identify criminals.
On television, this process is quick and conclusive. In real life, however, it is much more complicated. If the material found at the crime scene is too small, too old, or has otherwise been damaged, analyzing the DNA can be difficult. Furthermore, if the sample came from teeth, hair, or bones, it must undergo a different type of analysis called mitochondrial DNA analysis, which uses DNA from a cell's mitochondria instead of the nucleus. Matching mitochondrial DNA is often more difficult than nuclear DNA.
Furthermore, forensic experts never suggest that DNA evidence is concrete proof of a suspect's guilt. Forensic science is rooted in probability, not certainty. When the DNA of a suspect is found at a crime scene, it means that the suspect was likely to have been present at the crime scene, but it does not definitively indicate that he or she was guilty of a crime.
Question: What is the best summary of the passage?
(Multiple Choice)
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Guide dogs
Guide dogs are service animals that are specially trained to help visually impaired people. Most guide dogs are Labrador Retrievers, Golden Retrievers, or German Shepherds, breeds known for their intelligence, gentleness, and friendliness. Puppies that might become guide dogs are monitored from a very young age by trainers. Puppies that demonstrate a good temperament and willingness to learn begin their training at about 16 months of age.
Puppies that have been selected for training live with their trainer's family for about a year. Trainers teach the puppies to walk in straight lines, avoid obstacles, and stop at curbs. The dog learns how to focus on the owner instead of distractions, such as food, toys, or other animals. Guide dogs learn how to obey their owners, but also when to refuse their owner's commands when it might lead to danger, such as crossing a busy street.
When the dog is full-grown, the trainer brings it in for a final assessment. If the dog passes the test, it is placed with a visually impaired person in need of a service animal. If the dog fails the assessment, however, it often remains as a pet with the trainer's family. Although trainers might be sad to part with the dog that they have bonded with, they know that their former charge has become an invaluable resource for someone in need.
What can be inferred from the text?
(Multiple Choice)
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Diabetes
There are two types of diabetes: Type 1 and Type 2. Both types of diabetes can cause a variety of serious health risks if left untreated. Some of these health problems include kidney disease, blindness, heart disease, and strokes.
About 5-10% of people with diabetes have Type 1 diabetes. Type 1 diabetes most commonly develops in young people. In Type 1 diabetes, the immune system destroys the cells in the pancreas that secrete insulin. Without insulin, the body's cells cannot absorb glucose, and thus cannot produce energy. Symptoms appear after about 90% of the cells have been destroyed. Although most cases of Type 1 diabetes are genetic, some have arisen in people who have had viral infections of the pancreas.
Most people who have diabetes (90-95%) have type 2 diabetes, which most commonly develops in people over age 40. Type 2 diabetes results from the inability of tissues to respond to insulin-a condition called insulin resistance. As Type 2 diabetes progresses, the pancreas produces less and less insulin, resulting in a condition called insulin deficiency.
There is no cure for either Type 1 or Type 2 diabetes. However, there are ways to manage both types. For Type 1 diabetes, treatment requires receiving regular insulin injections. Type 2 diabetes can also be treated with insulin injections, but can be also be managed with lifestyle changes, such as weight loss, exercise, and reducing intake of carbohydrates.
According to the text, what do both types of diabetes mentioned have in common?
(Multiple Choice)
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Dreams
The average adult spends almost two full hours every night dreaming. Dreams mainly occur during a period known as REM (Rapid Eye Movement) sleep. While you are in REM sleep, your brain is very active-almost as active as if you were awake. The fact that we dream most often during REM sleep is one of very few facts about dreams that every scientist agrees on. Scientists do not know exactly which portion of the brain creates dreams or even why we have them in the first place.
One theory about their purpose is that dreaming helps the brain to organize and store memories. As your body relaxes, your brain processes all of the information it received during the day. While you sleep, your brain organizes the information into memories; your mind perceives this process as dreaming. Because your mind works differently when you are asleep than it does when you are awake, your dreams may seem confusing, illogical, or just downright silly.
Another theory is that dreams allow your mind to work out difficult problems that you encounter while you are awake. The unrealistic, free-flowing nature of dreams allows your mind to consider the problems in creative ways that you would likely never think of during your waking hours. Still other scientists believe that dreams are random events with no real function. According to this theory, there is no actual reason for dreaming-it is simply what happens when you go to sleep.
As you can see, there is no scientific consensus about how or why we dream. There are many different theories, but no proven answers. Until then, you might as well just enjoy the fantastic nighttime adventures you get to go on without ever leaving your bed.
Question: How do some scientists explain the puzzling nature of dreams?
(Multiple Choice)
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Placebos
A placebo is any kind of drug, procedure, or treatment that does not have legitimate medicinal properties. Placebos do not contain any sort of active ingredient meant to treat an illness or injury. Placebo pills, for example, might be made out of sugar or corn starch. However, even though placebos contain no medicine whatsoever, people who take them often experience reactions that cannot possibly be triggered by the substances in the pills themselves. This is known as the placebo effect.
In one study of the placebo effect, volunteers were given a starch pill and told that it was a stimulant similar to caffeine. These volunteers reported feeling more alert and slightly jittery. They also showed an increased heart rate and a spike in blood pressure. Researchers then gave the exact same placebo pill to a different group of people, this time telling them that it was a depressant. The second group of participants reported feeling drowsy and sluggish, and showed a reduced heart rate and lowered blood pressure.
Researchers use placebos to evaluate the effectiveness and possible side effects of new drugs. For example, during a study for a drug to treat depression, half of the participants might be given the actual drug while the other half are given a placebo. None of the participants know whether or not they are taking the real drug or the placebo. Researchers can then compare the results between the two groups to determine whether or not the drug produces the desired results and examine the side effects.
Question: Why does the author include the example of a study for a drug to treat depression in paragraph 3?
(Multiple Choice)
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Hangovers
Veisalgia, more commonly known as a hangover, is the name for the range of unpleasant physical effects that occur following the excessive consumption of alcoholic beverages. The most commonly experienced effects include nausea, vomiting, sensitivity to light and sound, headache, thirst, and lethargy. The degree of the hangover's severity is determined by factors occurring both before and after the alcohol is metabolized.
The main pre-metabolic cause of veisalgia is the quantity of alcohol consumed. Binge drinking is one of the most notorious contributors to hangovers. Empirical research suggests that even an increase in consumption from four to six beers can result in twice the susceptibility to end up with a hangover. Another pre-consumption factor that contributes to hangovers is the amount of congeners present in the alcohol. Congeners are chemical substances produced during the fermentation process that give the alcohol color, taste, and aroma. Recent studies have shown that alcohol with a high congener content, such as bourbon (which is brown), is three times as likely to cause a hangover as the same amount of a low-congener alcohol, such as vodka (which is clear).
Post-metabolic causes of veisalgia have less to do with the amount or kind of alcohol consumed and more to do with genetics. One of the major post-metabolic causes of veisalgia is the production of acetaldehyde. During the initial stages of metabolization, the liver produces an enzyme known as alcohol dehydrogenase. This enzyme works to convert the ethanol present in alcohol into the compound acetaldehyde. Studies have shown that individuals who lack this enzyme-and thus also lack the ability to break down ethanol in the liver-have a much higher rate of hangover occurrence, and experience more immediate and more severe hangover symptoms.
Question: Which of the following is true of congeners?
(Multiple Choice)
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Dissociative Identity Disorder
Dissociative Identity Disorder (DID), formerly called multiple personality disorder, is a severe psychological condition in which two or more distinct identities are present in an individual. There has been a dramatic increase in the number of diagnosed cases of DID in the past 30 years. There has also been an increase in the number of different personalities reported, as well as more unusual personalities. This may be due to an increased awareness of the disease among clinicians. However, it might also be because there have been so many sensational portrayals of DID in popular media.
Some believe that people fake the disorder in order to absolve themselves of guilt or gain attention. However, there is a good deal of research that suggests that DID is a legitimate illness. One of the strongest pieces of evidence is fact that it is found all over the world. There have been cases of DID reported in cities and villages across Turkey, Nigeria, Ethiopia, China, and India, among other places. It is unlikely that people living in rural or remote places have been influenced by portrayals of DID in films or television shows.
Others argue that DID is the creation of overzealous clinicians who (unwittingly) induce highly suggestible clients to believe they have multiple personalities. These clinicians encourage clients to "bring out" the other personalities during hypnosis and reward them with praise for doing so, which then makes the clients more likely to believe that the other personalities are real. If this is the case, it may not be a "genuine" illness in that the clinicians have created it, but is this any different than a "genuine" mental illness that is fostered by other people's influences on a client's life? No matter what has caused the illness, it causes significant distress to the client, and therefore must be treated as a serious and "genuine" problem.
Question: What is the main idea of the passage?
(Multiple Choice)
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Hangovers
Veisalgia, more commonly known as a hangover, is the name for the range of unpleasant physical effects that occur following the excessive consumption of alcoholic beverages. The most commonly experienced effects include nausea, vomiting, sensitivity to light and sound, headache, thirst, and lethargy. The degree of the hangover's severity is determined by factors occurring both before and after the alcohol is metabolized.
The main pre-metabolic cause of veisalgia is the quantity of alcohol consumed. Binge drinking is one of the most notorious contributors to hangovers. Empirical research suggests that even an increase in consumption from four to six beers can result in twice the susceptibility to end up with a hangover. Another pre-consumption factor that contributes to hangovers is the number of congeners present in the alcohol. Congeners are chemical substances produced during the fermentation process that give the alcohol color, taste, and aroma. Recent studies have shown that alcohol with a high congener content, such as bourbon (which is brown), is three times as likely to cause a hangover as the same amount of low-congener alcohol, such as vodka (which is clear).
Post-metabolic causes of veisalgia have less to do with the amount or kind of alcohol consumed and more to do with genetics. One of the major post-metabolic causes of veisalgia is the production of acetaldehyde. During the initial stages of metabolization, the liver produces an enzyme known as alcohol dehydrogenase. This enzyme works to convert the ethanol present in alcohol into the compound acetaldehyde. Studies have shown that individuals who lack this enzyme-and thus also lack the ability to break down ethanol in the liver-have a much higher rate of hangover occurrence, and experience more immediate and more severe hangover symptoms.
Question: What is the author's primary purpose in writing this essay?
(Multiple Choice)
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Carbon Monoxide Poisoning
Carbon monoxide (CO) is a poisonous gas that has is odorless, colorless, and tasteless. These qualities make it possible for you to breathe in toxic amounts of carbon monoxide without realizing that you are in danger.
Carbon monoxide is produced when materials that contain carbon, such as wood, coal, gasoline, oil, or natural gas, are burned. If the space where the materials are burned is not ventilated properly, then the carbon monoxide that is released can build to dangerous levels.
Inhaling carbon monoxide causes the gas to build up in your bloodstream. CO molecules displace oxygen in your blood, depriving your heart, brain, and other organs of oxygen. Early signs of carbon monoxide poisoning include flu-like symptoms, such as dizziness, drowsiness, headache, blurred vision, nausea, and vomiting. Prolonged exposure to large amounts of CO can lead to unconsciousness, irreversible heart, lung, or brain damage, and death.
People who are most at risk of carbon monoxide poisoning include pregnant women, young children, the elderly, and people with serious heart or lung conditions. To prevent carbon monoxide poisoning, people should make sure that places where carbon-containing materials are burned are properly ventilated. Carbon monoxide detectors should also be present in homes, garages, and workspaces.
What is the best meaning of the word 'depriving' in paragraph 3?
(Multiple Choice)
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