The primary effect of increasedPCO2 in the lungs is to cause ________ which ________ the ventilation-perfusion ratio back to a normal level.

A) bronchodilation : increases
B) vasoconstriction : decreases
C) vasoconstriction : increases
D) bronchoconstriction : decreases
E) vasodilation : decreases


Ans: A) bronchodilation : increases

Biology & Microbiology

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