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Set 31 Breathing

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Question 1

(Multiple Choice)

Free
_______ describes bulk flow of air or water between the gas exchange membranes in an animal and the outside world.

A) Diffusion
B) Breathing
C) External respiration
D) Ventilation
E) Cellular respiration

Answer

Question 2

(Multiple Choice)

Free
If the partial pressure of oxygen in the blood is lower than the partial pressure of oxygen in the body's tissues,

A) oxygen will diffuse out of the blood into the tissues.
B) oxygen will diffuse into the blood from the tissues.
C) carbon dioxide will diffuse into the blood from the tissues.
D) there will be no diffusion of gases between the tissues and the blood.
E) oxygen will be pumped from the blood into the tissues via active transport.

Answer

Question 3

(Multiple Choice)

Free
August Krogh determined that the maximum distance over which O2 can flow across a tissue or tissue fluids and still meet the metabolic demands of the organism is

A) 0.05 mm.
B) 0.5 mm.
C) 5.0 mm.
D) 50.0 mm.
E) 5.0 cm.

Answer