Course

Introductory Biology

Study Pack

Set 37 Respiratory Systems

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Question 1

(Multiple Choice)

Free
The atmospheric pressure on top of Mt.Everest is only about 238 mmHg,so the approximate partial pressure of oxygen there is

A)2.4 mmHg.
B)50 mmHg.
C)186 mmHg.
D)238 mmHg.
E)476 mmHg.

Answer

Question 2

(Multiple Choice)

Free
Imagine that you have two people using breathing gear under water.Diver 1 is using an old style "rebreather" that removes carbon dioxide before the mixture is "rebreathed" and therefore decreases overall carbon dioxide concentrations in the blood.Diver 2 is using regular SCUBA gear and is breathing air with the normal amount of carbon dioxide that does not lower blood levels of carbon dioxide.Which diver would have a higher blood pH and which would feel more an "urge to breathe"?

A)Diver 1 would have higher blood pH and would feel the "urge to breathe" sooner.
B)Diver 2 would have higher blood pH and feel the "urge to breathe" sooner.
C)Diver 1 would have higher blood pH,while Diver 2 would feel the "urge to breathe" sooner.
D)Diver 2 would have higher blood pH,while Diver 1 would feel the "urge to breathe" sooner.
E)There would be no difference in blood pH or breathing between the two divers.

Answer

Question 3

(Multiple Choice)

Free
The proportion of the total air pressure that is exerted by an individual gas in a gas mixture is referred to as the

A)partial pressure of that gas.
B)incomplete pressure of that gas.
C)total pressure of that gas.
D)gas-specific gravity of that gas.
E)barometry of that gas.

Answer