Question

Which of the following would decrease the partial pressure of both oxygen and carbon dioxide gas in alveolar air?

Group of answer choices

Mixing of inhaled air with residual air

A decrease in altitude

Gas exchange between alveolar air and the pulmonary capillaries

An increase in the partial pressure of water vapor in inhaled air

Answer 1

Ans:- d) An increase in the partial pressure of water vapor in inhaled air.

Because when amount of water vapor increases in inhaled air then amount of CO2 and oxygen decreases in inhaled air.

It's simple for initially if u have the capacity to eat 10 fruits.

In case A :- u eat 5 apple (oxygen) and5 banana.(carbon dioxide)

Incase B :- if u have already eaten 3 pineapple ( water vapour) then relatively eating capacity of both apple and banana will decrease.

Hence presence of water vapor will decrease both oxygen and carbon dioxide partial pressure.

Option a) partial pressure of oxygen will dec but co2 will increase.

In option b) partial pressure of both will increase

Option c) partial pressure is oxygen will decrease but carbon dioxide partial pressure increses.