Question 1

The smaller the distance over which a gas must diffuse, the more slowly it will diffuse.

Accepted Answer

A) True 
 B)False

Question 2

The tiniest bronchiole extensions open into the

Accepted Answer

A)  trachea.
B)  bronchi.
C)  alveoli.
D)  pharynx.

Question 3

Blood arriving at a cell that is performing cellular respiration would

Accepted Answer

A)  contain red blood cells with oxygen bound to most of its hemoglobin and a lower concentration of carbon dioxide than the cell.
B)  contain little remaining hemoglobin and a higher concentration of carbon dioxide than the cell.
C)  deposit its hemoglobin onto the plasma membrane of the cell to release oxygen and pick up carbon dioxide.
D)  contain hemoglobin largely depleted of oxygen and a lower concentration of carbon dioxide than the cell.

Question 4

Too much salt in the diet can increase blood pressure because

Accepted Answer

A)  greater solute levels cause interstitial fluid and blood plasma volume to increase with water.
B)  the blood volume loses water and becomes too thick.
C)  salt forces the blood vessels to constrict.
D)  interstitial fluid and blood plasma are more concentrated with salt and make the heart beat quicker.

Question 5

Which of the following statements about oxygen-binding pigments is false?

Accepted Answer

A)  They float freely in the liquid portion of human blood.
B)  They increase the blood's ability to carry oxygen.
C)  They are made of a complex protein bound to iron atoms.
D)  They bind reversibly to oxygen.

Question 6

What tube connects the pharynx to the bronchi?

Accepted Answer

A)  the trachea
B)  the alveoli
C)  the bronchioles
D)  the tracheoles

Question 7

Ectothermic animals have a larger surface area available for gas exchange than endothermic animals.

Accepted Answer

A) True 
 B)False

Question 8

The process of inhalation requires more energy than the process of exhalation.

Accepted Answer

A) True 
 B)False

Question 9

Hemoglobin, like many other oxygen-binding pigments, contains the metallic element ____________________.

Accepted Answer

The answer of Hemoglobin, like many other oxygen-binding pigments, contains...

Question 10

The figure below illustrates the inhalation step of gas exchange in humans.
  
In this figure, the diaphragm and the muscles of the rib cage are ____________________ [relaxed or contracted].

Accepted Answer

The answer of The figure below illustrates the inhalation step...

Question 11

Which of the following best describes the journey of an oxygen molecule in a lung?

Accepted Answer

A)  It travels from an alveolus to a bronchiole to a capillary to a red blood cell to hemoglobin.
B)  It travels from a bronchiole to an alveolus to a capillary to hemoglobin to a red blood cell.
C)  It travels from a bronchiole to an alveolus to a capillary to a red blood cell to hemoglobin.
D)  It travels from a bronchiole to an alveolus to a red blood cell to a capillary to hemoglobin.

Question 12

In human lungs, gases are exchanged in tiny sacs called

Accepted Answer

A)  gills.
B)  tracheoles.
C)  alveoli.
D)  spongy parenchyma.

Question 13

In the figure below, the arrow is pointing to the

Accepted Answer

A)  bronchus.
B)  trachea.
C)  diaphragm.
D)  larynx.

Question 14

The ____________________ contracts in order to pump blood through the systemic circuit.

Accepted Answer

The answer of The ____________________ contracts in order to pump...

Question 15

A mitochondrion in a cell undergoing cellular respiration would

Accepted Answer

A)  have a higher concentration of oxygen than the surrounding cytosol.
B)  lose oxygen by diffusion.
C)  lose carbon dioxide by diffusion.
D)  gain oxygen by being in direct contact with hemoglobin.

Question 16

Air entering the lungs has a

Accepted Answer

A)  higher concentration of carbon dioxide than air in an alveolus.
B)  higher concentration of both carbon dioxide and oxygen than in an alveolus.
C)  higher concentration of oxygen and a lower concentration of carbon dioxide than in an alveolus.
D)  lower concentration of oxygen and a concentration of carbon dioxide equal to that in an alveolus.

Question 17

The concentration of oxygen in blood plasma near an alveolus is lowered when

Accepted Answer

A)  nearby red blood cells release carbon dioxide.
B)  oxygen diffuses into red blood cells and binds to hemoglobin.
C)  carbon dioxide diffuses into an alveolus.
D)  oxygen diffuses out into the alveolus.

Question 18

Another name for the "pacemaker" is the

Accepted Answer

A)  atrioventricular (AV)  node.
B)  sino atrial (S
A)   node.
C)  atrium.
D)  ventrical.

Question 19

Blood in a capillary leaving a nearby cell would contain

Accepted Answer

A)  a lower concentration of carbon dioxide than when it arrived.
B)  a higher concentration of carbon dioxide than when it arrived.
C)  a higher concentration of oxygen than when it arrived.
D)  less hemoglobin than when it arrived.

Question 20

Examine the table below. 
Based on the data in this table, which of these fish is probably the fastest swimmer?

Accepted Answer

A)  rudderfish
B)  eel
C)  flounder
D)  goosefish

Exam 28: Circulation and Gas Exchange

The ____________________ contracts in order to pump blood through the systemic circuit.

Correct AnswerverifiedShow Answer

Which of the following best describes the journey of an oxygen molecule in a lung?

Correct AnswerverifiedShow Answer

Another name for the "pacemaker" is the

Correct AnswerverifiedShow Answer

In the figure below, the arrow is pointing to the

Correct AnswerverifiedShow Answer

A mitochondrion in a cell undergoing cellular respiration would

Correct AnswerverifiedShow Answer

The process of inhalation requires more energy than the process of exhalation.

Correct AnswerverifiedShow Answer

Air entering the lungs has a

Correct AnswerverifiedShow Answer

Blood arriving at a cell that is performing cellular respiration would

Correct AnswerverifiedShow Answer

The figure below illustrates the inhalation step of gas exchange in humans. In this figure, the diaphragm and the muscles of the rib cage are ____________________ [relaxed or contracted].

Correct AnswerverifiedShow Answer

In human lungs, gases are exchanged in tiny sacs called

Correct AnswerverifiedShow Answer

Which of the following statements about oxygen-binding pigments is false?

Correct AnswerverifiedShow Answer

What tube connects the pharynx to the bronchi?

Correct AnswerverifiedShow Answer

Ectothermic animals have a larger surface area available for gas exchange than endothermic animals.

Correct AnswerverifiedShow Answer

The smaller the distance over which a gas must diffuse, the more slowly it will diffuse.

Correct AnswerverifiedShow Answer

The tiniest bronchiole extensions open into the

Correct AnswerverifiedShow Answer

The concentration of oxygen in blood plasma near an alveolus is lowered when

Correct AnswerverifiedShow Answer

Too much salt in the diet can increase blood pressure because

Correct AnswerverifiedShow Answer

Blood in a capillary leaving a nearby cell would contain

Correct AnswerverifiedShow Answer

Hemoglobin, like many other oxygen-binding pigments, contains the metallic element ____________________.

Correct AnswerverifiedShow Answer

Examine the table below. Based on the data in this table, which of these fish is probably the fastest swimmer?

Correct AnswerverifiedShow Answer

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