Question 1

While observing goldfish, you notice that gill flaps move up and down in a constant rhythm. This movement

Accepted Answer

A) helps the fish take in small gulps of air and store them in lunglike sacs. 
B) requires less energy than moving air over the gills. 
C) is unnecessary when the fish are swimming constantly. 
D) ensures that the gas exchange organs of the fish are surrounded by oxygen-rich water. 
A) helps the fish take in small gulps of air and store them in lunglike sacs. 
B) requires less energy than moving air over the gills. 
C) is unnecessary when the fish are swimming constantly. 
D) ensures that the gas exchange organs of the fish are surrounded by oxygen-rich water.

Question 2

In blood arriving at an alveolus, the concentration of

Accepted Answer

A) oxygen is lower in the alveolus than in the blood. 
B) carbon dioxide is higher in the alveolus than in the blood. 
C) carbon dioxide is higher in the blood than in the alveolus. 
D) carbon dioxide in the blood is equal to the concentration of oxygen in the alveolus. 
A) oxygen is lower in the alveolus than in the blood. 
B) carbon dioxide is higher in the alveolus than in the blood. 
C) carbon dioxide is higher in the blood than in the alveolus. 
D) carbon dioxide in the blood is equal to the concentration of oxygen in the alveolus.

Question 3

Pieces of cells found in blood plasma that can collect and block blood flow are called ____________________.

Accepted Answer

The answer of Pieces of cells found in blood plasma...

Question 4

Blood plasma contains dissolved oxygen when it leaves alveoli.

Accepted Answer

A) True 
 B)False

Question 5

Blood pressure increases when blood vessels constrict and their diameters decrease.

Accepted Answer

A) True 
 B)False

Question 6

Oxygen and carbon dioxide diffuse much more slowly in water than in air.

Accepted Answer

A) True 
 B)False

Question 7

People with sickle-cell anemia have deformed hemoglobin molecules and often suffer muscle pains, even at low levels of exertion. These symptoms might come about because the deformed hemoglobin

Accepted Answer

A) is unable to carry the amount of oxygen required for normal activities of muscles. 
B) cannot diffuse across the cells' membranes from the blood plasma. 
C) causes damage to the muscle cells as it enters the muscle. 
D) decreases the person's ratio of surface area to volume. 
A) is unable to carry the amount of oxygen required for normal activities of muscles. 
B) cannot diffuse across the cells' membranes from the blood plasma. 
C) causes damage to the muscle cells as it enters the muscle. 
D) decreases the person's ratio of surface area to volume.

Question 8

If skin was the gas exchange surface for humans, it would have sufficient surface area to support our need for oxygen.

Accepted Answer

A) True 
 B)False

Question 9

At high altitudes, gases are less concentrated. You may gasp for air, because

Accepted Answer

A) the surface area of your lungs will be decreased. 
B) the amount of hemoglobin in your blood will decrease. 
C) hemoglobin will not be able to bind to oxygen as well at a higher altitude. 
D) the amount of oxygen that could diffuse into your blood will be decreased. 
A) the surface area of your lungs will be decreased. 
B) the amount of hemoglobin in your blood will decrease. 
C) hemoglobin will not be able to bind to oxygen as well at a higher altitude. 
D) the amount of oxygen that could diffuse into your blood will be decreased.

Question 10

The ____________________ that aquatic animals use for gas exchange have evolved several times, but they are always structured to provide the maximum surface area for gas exchange.

Accepted Answer

The answer of The ____________________ that aquatic animals use for...

Question 11

In what way, if any, is the circulatory system of humans important to the process of gas exchange?

Accepted Answer

A) It has no importance to gas exchange. 
B) It allows air to be taken into the lungs. 
C) It increases the area available for gas exchange. 
D) It carries oxygen to cells that are not in direct contact with air. 
A) It has no importance to gas exchange. 
B) It allows air to be taken into the lungs. 
C) It increases the area available for gas exchange. 
D) It carries oxygen to cells that are not in direct contact with air.

Question 12

Gills were the first gas exchange organ to evolve in animals.

Accepted Answer

A) True 
 B)False

Question 13

Bubbles form in a glass of water because it contains dissolved ____________________.

Accepted Answer

The answer of Bubbles form in a glass of water...

Question 14

Which of the following is false?

Accepted Answer

A) Oxygen diffuses much more slowly in water than in air. 
B) At the same altitude and temperature, the concentration of oxygen in water is higher than in air. 
C) Water is about 1,000 times denser than air. 
D) Air and water contain oxygen available for cellular respiration. 
A) Oxygen diffuses much more slowly in water than in air. 
B) At the same altitude and temperature, the concentration of oxygen in water is higher than in air. 
C) Water is about 1,000 times denser than air. 
D) Air and water contain oxygen available for cellular respiration.

Question 15

Which of the following describes the journey of a molecule of oxygen from the pharynx to an alveolus?

Accepted Answer

A) pharynx to trachea to bronchus to bronchiole to alveolus 
B) pharynx to trachea to bronchiole to bronchus to alveolus 
C) pharynx to bronchiole to bronchus to trachea to alveolus 
D) pharynx to bronchus to bronchiole to trachea to alveolus 
A) pharynx to trachea to bronchus to bronchiole to alveolus 
B) pharynx to trachea to bronchiole to bronchus to alveolus 
C) pharynx to bronchiole to bronchus to trachea to alveolus 
D) pharynx to bronchus to bronchiole to trachea to alveolus

Question 16

Which of the following would not be a characteristic of an organ used for gas exchange?

Accepted Answer

A) high surface area 
B) covered by waterproofing layers 
C) moist surfaces 
D) very thin tissues 
A) high surface area 
B) covered by waterproofing layers 
C) moist surfaces 
D) very thin tissues

Question 17

Carbon dioxide

Accepted Answer

A) is carried by a different binding pigment in the blood than is oxygen. 
B) is generated in relatively high amounts inside the mitochondrion. 
C) moves from regions of cellular respiration to the alveoli dissolved in the cytoplasm of red blood cells. 
D) attaches to hemoglobin, causing structural changes that make oxygen binding more efficient. 
A) is carried by a different binding pigment in the blood than is oxygen. 
B) is generated in relatively high amounts inside the mitochondrion. 
C) moves from regions of cellular respiration to the alveoli dissolved in the cytoplasm of red blood cells. 
D) attaches to hemoglobin, causing structural changes that make oxygen binding more efficient.

Exam 28: Circulation and Gas Exchange

While observing goldfish, you notice that gill flaps move up and down in a constant rhythm. This movement

In blood arriving at an alveolus, the concentration of

Pieces of cells found in blood plasma that can collect and block blood flow are called ____________________.

Blood plasma contains dissolved oxygen when it leaves alveoli.

Blood pressure increases when blood vessels constrict and their diameters decrease.

Oxygen and carbon dioxide diffuse much more slowly in water than in air.

People with sickle-cell anemia have deformed hemoglobin molecules and often suffer muscle pains, even at low levels of exertion. These symptoms might come about because the deformed hemoglobin

If skin was the gas exchange surface for humans, it would have sufficient surface area to support our need for oxygen.

At high altitudes, gases are less concentrated. You may gasp for air, because

The ____________________ that aquatic animals use for gas exchange have evolved several times, but they are always structured to provide the maximum surface area for gas exchange.

In what way, if any, is the circulatory system of humans important to the process of gas exchange?

Gills were the first gas exchange organ to evolve in animals.

Bubbles form in a glass of water because it contains dissolved ____________________.

Which of the following is false?

Which of the following describes the journey of a molecule of oxygen from the pharynx to an alveolus?

Which of the following would not be a characteristic of an organ used for gas exchange?

Carbon dioxide

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