Question 1

Each molecule of hemoglobin can bind to six molecules of oxygen.

Accepted Answer

A) True 
 B)False

Question 2

Match each term with its description.
-physiological respiration

Accepted Answer

A)  flow of blood (or body fluids)  on the internal side of the respiratory surface
B)  gas exchange between the blood and body tissue cells
C)  general term used to describe an animal's exchange of gases with the respiratory medium
D)  specifically describes the release of air from the lungs to the atmosphere
E)  flow of the respiratory medium over the external side of the respiratory surfaceF) occurs due to the expansion of the lungs and thoracic cavityG) exchange of gases between the respiratory medium and the blood (or internal body fluids) H) D) and E)
I) E) and G)

Question 3

What is the function of carbonic anhydrase?

Accepted Answer

A)   to speed up the rate at which CO2 binds to hemoglobin
B)   to speed up the rate at which CO2 binds to O2
C)   to speed up the conversion of CO2 and H2O into HCO3- and H+
D)   to speed up the conversion of HCO3- and O- into CO2 and H2OE) A) and C)
F) A) and D)

Question 4

Where in an insect tracheal system does gas exchange occur between the air and a cell?

Accepted Answer

A)   in the tracheoles
B)   in the tracheal branches
C)   in the trachea
D)   in the gill filamentsE) A) and D)
F) A) and C)

Question 5

Which airway structure acts as the "windpipe"?

Accepted Answer

A)   the bronchus
B)   the bronchiole
C)   the larynx
D)   the tracheaE) A) and B)
F) None of the above

Question 6

In which animal would perfusion be least efficient during gas exchange?

Accepted Answer

A)   a fish
B)   a bird
C)   a flatworm
D)   a humanE) A) and B)
F) None of the above

Question 7

Through what process is O2 transported into the blood from air in the lungs?

Accepted Answer

A)   active transport
B)   osmosis
C)   facilitated diffusion
D)   simple diffusionE) A) and B)
F) A) and C)

Question 8

Which of the following is responsible for closing off the airway during swallowing?

Accepted Answer

A)   the larynx
B)   the epiglottis
C)   the pharynx
D)   the intercostal musclesE) None of the above
F) B) and D)

Question 9

Match each term with its description.
-exhalation

Accepted Answer

A)  flow of blood (or body fluids)  on the internal side of the respiratory surface
B)  gas exchange between the blood and body tissue cells
C)  general term used to describe an animal's exchange of gases with the respiratory medium
D)  specifically describes the release of air from the lungs to the atmosphere
E)  flow of the respiratory medium over the external side of the respiratory surfaceF) occurs due to the expansion of the lungs and thoracic cavityG) exchange of gases between the respiratory medium and the blood (or internal body fluids) H) B) and D)
I) A) and C)

Question 10

CO2 and H2O are converted to HCO3- and H+ in the blood of the lungs.

Accepted Answer

A) True 
 B)False

Question 11

Describe three adaptations that enhance the function of a respiratory surface.

Accepted Answer

Gas diffusion can be enhanced across a r...

Question 12

What is the gas transport cascade?

Accepted Answer

A)   a synonym for gas diffusion
B)   steps in oxygen and carbon dioxide transport between the environment and mitochondria
C)   steps in oxygen transport only, between the environment and mitochondria
D)   steps in carbon dioxide transport only, between the environment and mitochondriaE) C) and D)
F) None of the above

Question 13

Birds utilize crosscurrent mechanisms to optimize diffusion of O2 across their respiratory surfaces.

Accepted Answer

A) True 
 B)False

Question 14

What would you predict to happen in an area of the body where blood is relatively cool?

Accepted Answer

A)   CO2 would bind more readily to hemoglobin.
B)   O2 would bind more readily to hemoglobin.
C)   CO2 would release from hemoglobin.
D)   O2 would release from hemoglobin.E) A) and D)
F) A) and C)

Question 15

Why does countercurrent exchange optimize gas exchange across some gills?

Accepted Answer

A)   It sustains an optimal thermal environment for gas exchange.
B)   It optimizes perfusion to the respiratory surface.
C)   It sustains an optimal respiratory gas concentration gradient.
D)   It optimizes delivery of the respiratory medium to the respiratory surface.E) A) and B)
F) C) and D)

Question 16

Humans ventilate their lungs by negative pressure breathing.

Accepted Answer

A) True 
 B)False

Exam 40: Gas Exchange: the Respiratory System

In which animal would perfusion be least efficient during gas exchange?

Correct Answer
verified

Why does countercurrent exchange optimize gas exchange across some gills?

Correct Answer
verified

Humans ventilate their lungs by negative pressure breathing.

Correct Answer
verified

Match each term with its description. -exhalation

Correct Answer
verified

Match each term with its description. -physiological respiration

Correct Answer
verified

Which airway structure acts as the "windpipe"?

Correct Answer
verified

CO₂ and H₂O are converted to HCO₃^- and H⁺ in the blood of the lungs.

Correct Answer
verified

What would you predict to happen in an area of the body where blood is relatively cool?

Correct Answer
verified

What is the function of carbonic anhydrase?

Correct Answer
verified

What is the gas transport cascade?

Correct Answer
verified

Describe three adaptations that enhance the function of a respiratory surface.

Correct Answer
verified
Gas diffusion can be enhanced across a r...
View Answer

Each molecule of hemoglobin can bind to six molecules of oxygen.

Correct Answer
verified

Where in an insect tracheal system does gas exchange occur between the air and a cell?

Correct Answer
verified

Which of the following is responsible for closing off the airway during swallowing?

Correct Answer
verified

Birds utilize crosscurrent mechanisms to optimize diffusion of O₂ across their respiratory surfaces.

Correct Answer
verified

Through what process is O₂ transported into the blood from air in the lungs?

Correct Answer
verified

Exam 40: Gas Exchange: the Respiratory System

In which animal would perfusion be least efficient during gas exchange?

Correct AnswerverifiedShow Answer

Why does countercurrent exchange optimize gas exchange across some gills?

Correct AnswerverifiedShow Answer

Humans ventilate their lungs by negative pressure breathing.

Correct AnswerverifiedShow Answer

Match each term with its description. -exhalation

Correct AnswerverifiedShow Answer

Match each term with its description. -physiological respiration

Correct AnswerverifiedShow Answer

Which airway structure acts as the "windpipe"?

Correct AnswerverifiedShow Answer

CO2 and H2O are converted to HCO3- and H+ in the blood of the lungs.

Correct AnswerverifiedShow Answer

What would you predict to happen in an area of the body where blood is relatively cool?

Correct AnswerverifiedShow Answer

What is the function of carbonic anhydrase?

Correct AnswerverifiedShow Answer

What is the gas transport cascade?

Correct AnswerverifiedShow Answer

Describe three adaptations that enhance the function of a respiratory surface.

Correct AnswerverifiedGas diffusion can be enhanced across a r...View AnswerShow Answer

Each molecule of hemoglobin can bind to six molecules of oxygen.

Correct AnswerverifiedShow Answer

Where in an insect tracheal system does gas exchange occur between the air and a cell?

Correct AnswerverifiedShow Answer

Which of the following is responsible for closing off the airway during swallowing?

Correct AnswerverifiedShow Answer

Birds utilize crosscurrent mechanisms to optimize diffusion of O2 across their respiratory surfaces.

Correct AnswerverifiedShow Answer

Through what process is O2 transported into the blood from air in the lungs?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

CO₂ and H₂O are converted to HCO₃^- and H⁺ in the blood of the lungs.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Gas diffusion can be enhanced across a r...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Birds utilize crosscurrent mechanisms to optimize diffusion of O₂ across their respiratory surfaces.

Correct Answer
verified

Through what process is O₂ transported into the blood from air in the lungs?

Correct Answer
verified