Question 1

A molecule of air enters the nose through the external nares. Which of the following is the correct pathway to the trachea?

Accepted Answer

A)  nasal cavity, larynx, pharynx, trachea 
B)  oral cavity, nasal cavity, larynx, pharynx, trachea 
C)  nasopharynx, nasal cavity, laryngopharynx, trachea 
D)  nasal cavity, pharynx, larynx, trachea 
E)  nasal cavity, trachea, larynx, pharynx 
A)  nasal cavity, larynx, pharynx, trachea 
B)  oral cavity, nasal cavity, larynx, pharynx, trachea 
C)  nasopharynx, nasal cavity, laryngopharynx, trachea 
D)  nasal cavity, pharynx, larynx, trachea 
E)  nasal cavity, trachea, larynx, pharynx

Question 2

Expiration during quiet breathing

Accepted Answer

A)  is an active process. 
B)  requires more muscle contractions than inspiration. 
C)  is due to contraction of the diaphragm and elevation of the ribs. 
D)  occurs when the diaphragm and external intercostal muscles relax. 
E)  is not affected by the elastic properties of the lungs. 
A)  is an active process. 
B)  requires more muscle contractions than inspiration. 
C)  is due to contraction of the diaphragm and elevation of the ribs. 
D)  occurs when the diaphragm and external intercostal muscles relax. 
E)  is not affected by the elastic properties of the lungs.

Question 3

Which of the following is part of the upper respiratory tract?

Accepted Answer

A)  lungs 
B)  pharynx 
C)  trachea 
D)  bronchi 
E)  bronchioles 
A)  lungs 
B)  pharynx 
C)  trachea 
D)  bronchi 
E)  bronchioles

Question 4

Match the term with the appropriate description or definition.
-vital capacity
"Enter the letter of the correct description below"

Accepted Answer

A) sum of the inspiratory reserve, expiratory reserve, tidal, and residual volumes 
B) volume of air inspired during a normal inspiration 
C) volume of air remaining in lungs after the most forceful expiration 
D) sum of the expiratory reserve, inspiratory reserve, and tidal volumes 
E) the amount of air that can be forcefully expired after expiration of the normal tidal volume 
A) sum of the inspiratory reserve, expiratory reserve, tidal, and residual volumes 
B) volume of air inspired during a normal inspiration 
C) volume of air remaining in lungs after the most forceful expiration 
D) sum of the expiratory reserve, inspiratory reserve, and tidal volumes 
E) the amount of air that can be forcefully expired after expiration of the normal tidal volume

Question 5

When the inspiratory muscles contract,

Accepted Answer

A)  thoracic volume increases. 
B)  pleural pressure increases. 
C)  the alveolar pressure increases. 
D)  expiration occurs. 
E)  thoracic volume decreases. 
A)  thoracic volume increases. 
B)  pleural pressure increases. 
C)  the alveolar pressure increases. 
D)  expiration occurs. 
E)  thoracic volume decreases.

Question 6

A protective function of the respiratory system would be

Accepted Answer

A)  altering blood pH by changing blood CO2 levels. 
B)  olfaction by drawing molecules into the nasal cavity. 
C)  producing ACE which helps regulate blood pressure. 
D)  preventing microorganisms from entering the body. 
A)  altering blood pH by changing blood CO2 levels. 
B)  olfaction by drawing molecules into the nasal cavity. 
C)  producing ACE which helps regulate blood pressure. 
D)  preventing microorganisms from entering the body.

Question 7

The trachea

Accepted Answer

A)  is located in the pleural cavity. 
B)  has "C" shaped cartilages that form its anterior and lateral sides. 
C)  is lined with keratinized squamous epithelium. 
D)  bifurcates to form the bronchioles. 
E)  collapses when not in use. 
A)  is located in the pleural cavity. 
B)  has "C" shaped cartilages that form its anterior and lateral sides. 
C)  is lined with keratinized squamous epithelium. 
D)  bifurcates to form the bronchioles. 
E)  collapses when not in use.

Question 8

Which of the following events in the chloride shift occurs last?

Accepted Answer

A)  Carbon dioxide diffuses into a red blood cell. 
B)  Carbonic acid dissociates to form bicarbonate and hydrogen ions. 
C)  Bicarbonate ions diffuse into the plasma. 
D)  CO2 and H2O $\rightarrow$H2CO3 
E)  Carbonic acid dissociates to form water and carbon dioxide. 
A)  Carbon dioxide diffuses into a red blood cell. 
B)  Carbonic acid dissociates to form bicarbonate and hydrogen ions. 
C)  Bicarbonate ions diffuse into the plasma. 
D)  CO2 and H2O $\rightarrow$H2CO3 
E)  Carbonic acid dissociates to form water and carbon dioxide.

Question 9

Most oxygen is carried in the blood ______; but most carbon dioxide is ________.

Accepted Answer

A)  dissolved in plasma; associated with salt or acid 
B)  bound to hemoglobin; associated with bicarbonate ions in the plasma 
C)  combined with albumin; associated with carbonic acid 
D)  bound to hemoglobin; bound to albumin 
E)  bound to plasma proteins; carried as carbon dioxide 
A)  dissolved in plasma; associated with salt or acid 
B)  bound to hemoglobin; associated with bicarbonate ions in the plasma 
C)  combined with albumin; associated with carbonic acid 
D)  bound to hemoglobin; bound to albumin 
E)  bound to plasma proteins; carried as carbon dioxide

Question 10

Gas exchange between the air and the blood takes place in the __________.

Accepted Answer

The answer of Gas exchange between the air and the...

Question 11

Why is transfused blood discarded after about 6 weeks of storage?

Accepted Answer

A)  It can not bind to oxygen anymore. 
B)  It becomes too thick. 
C)  The BPG levels are too low for adequate release of oxygen to tissues. 
D)  The percent oxygen saturation is too low. 
A)  It can not bind to oxygen anymore. 
B)  It becomes too thick. 
C)  The BPG levels are too low for adequate release of oxygen to tissues. 
D)  The percent oxygen saturation is too low.

Question 12

Oxygenated blood is carried to the tissues of the lungs via the

Accepted Answer

A)  pulmonary veins. 
B)  bronchial arteries. 
C)  pulmonary artery. 
D)  abdominal aorta. 
E)  pleural arteries. 
A)  pulmonary veins. 
B)  bronchial arteries. 
C)  pulmonary artery. 
D)  abdominal aorta. 
E)  pleural arteries.

Question 13

Which of the following statements is true?

Accepted Answer

A)  As thoracic volume increases, alveolar pressure (Palv) increases. 
B)  In expiration, the thoracic volume increases. 
C)  Constriction of bronchioles assists breathing. 
D)  As alveolar volume increases, alveolar pressure (Palv) decreases. 
E)  Pressure is directly proportional to volume. 
A)  As thoracic volume increases, alveolar pressure (Palv) increases. 
B)  In expiration, the thoracic volume increases. 
C)  Constriction of bronchioles assists breathing. 
D)  As alveolar volume increases, alveolar pressure (Palv) decreases. 
E)  Pressure is directly proportional to volume.

Question 14

-Which of the patients above might have a depression of the respiratory center due to drugs?

Accepted Answer

The answer of  
-Which of the patients above might...

Question 15

The ventral respiratory group

Accepted Answer

A)  is located in the pons. 
B)  stimulates the intercostal and abdominal muscles. 
C)  is part of the pontine respiratory group. 
D)  is active only in exhalation. 
E)  stimulates the diaphragm. 
A)  is located in the pons. 
B)  stimulates the intercostal and abdominal muscles. 
C)  is part of the pontine respiratory group. 
D)  is active only in exhalation. 
E)  stimulates the diaphragm.

Question 16

Match the term with the appropriate description or definition.
-tidal volume
"Enter the letter of the correct description below"

Accepted Answer

A) sum of the inspiratory reserve, expiratory reserve, tidal, and residual volumes 
B) volume of air inspired during a normal inspiration 
C) volume of air remaining in lungs after the most forceful expiration 
D) sum of the expiratory reserve, inspiratory reserve, and tidal volumes 
E) the amount of air that can be forcefully expired after expiration of the normal tidal volume 
A) sum of the inspiratory reserve, expiratory reserve, tidal, and residual volumes 
B) volume of air inspired during a normal inspiration 
C) volume of air remaining in lungs after the most forceful expiration 
D) sum of the expiratory reserve, inspiratory reserve, and tidal volumes 
E) the amount of air that can be forcefully expired after expiration of the normal tidal volume

Question 17

During swallowing, the opening into the larynx is covered by the

Accepted Answer

A)  epiglottis. 
B)  thyroid cartilage. 
C)  cricoid cartilage. 
D)  arytenoid cartilage. 
E)  the "Adam's apple". 
A)  epiglottis. 
B)  thyroid cartilage. 
C)  cricoid cartilage. 
D)  arytenoid cartilage. 
E)  the "Adam's apple".

Question 18

What is the volume of air that can be forcibly expired after expiration of the tidal volume?

Accepted Answer

A)  residual volume 
B)  inspiratory reserve volume 
C)  vital capacity 
D)  expiratory reserve volume 
A)  residual volume 
B)  inspiratory reserve volume 
C)  vital capacity 
D)  expiratory reserve volume

Question 19

Why is fetal hemoglobin very efficient at picking up oxygen?

Accepted Answer

A)  The BPG levels are much higher than in maternal hemoglobin. 
B)  The fetal oxygen-dissociation curve is to the right of the maternal oxygen-dissociation curve. 
C)  The concentration of fetal hemoglobin is 10% greater than the concentration of maternal hemoglobin. 
D)  The fetal oxygen-dissociation curve is to the left of the maternal oxygen-dissociation curve. 
A)  The BPG levels are much higher than in maternal hemoglobin. 
B)  The fetal oxygen-dissociation curve is to the right of the maternal oxygen-dissociation curve. 
C)  The concentration of fetal hemoglobin is 10% greater than the concentration of maternal hemoglobin. 
D)  The fetal oxygen-dissociation curve is to the left of the maternal oxygen-dissociation curve.

Question 20

Mr. Huff and Puff exhales normally; then, using forced expiration, he exhales as much air as possible. The volume of air still remaining in his lungs is called

Accepted Answer

A)  expiratory reserve volume. 
B)  tidal volume. 
C)  inspiratory reserve volume. 
D)  vital capacity. 
E)  residual volume. 
A)  expiratory reserve volume. 
B)  tidal volume. 
C)  inspiratory reserve volume. 
D)  vital capacity. 
E)  residual volume.

Exam 23: Respiratory System

A molecule of air enters the nose through the external nares. Which of the following is the correct pathway to the trachea?

Expiration during quiet breathing

Which of the following is part of the upper respiratory tract?

Match the term with the appropriate description or definition. -vital capacity "Enter the letter of the correct description below"

When the inspiratory muscles contract,

A protective function of the respiratory system would be

The trachea

Which of the following events in the chloride shift occurs last?

Most oxygen is carried in the blood ______; but most carbon dioxide is ________.

Gas exchange between the air and the blood takes place in the __________.

Why is transfused blood discarded after about 6 weeks of storage?

Oxygenated blood is carried to the tissues of the lungs via the

Which of the following statements is true?

-Which of the patients above might have a depression of the respiratory center due to drugs?

The ventral respiratory group

Match the term with the appropriate description or definition. -tidal volume "Enter the letter of the correct description below"

During swallowing, the opening into the larynx is covered by the

What is the volume of air that can be forcibly expired after expiration of the tidal volume?

Why is fetal hemoglobin very efficient at picking up oxygen?

Mr. Huff and Puff exhales normally; then, using forced expiration, he exhales as much air as possible. The volume of air still remaining in his lungs is called

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolyte, and Acid-Based Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Most oxygen is carried in the blood ; but most carbon dioxide is __.