When the level of blood flow is not ideally matched with the amount of airflow in a localized area of lung tissue,
A)autoregulatory mechanisms are invoked
B)the autonomic nervous system couples the events more ideally
C)and if airflow is low and blood flow too high, arteriolar vasoconstriction occurs
D)both a and b occur
E)both a and c occur

Question

Quizplus · Accepted Answer

When the level of blood flow is not ideally matched with the amount of airflow in a localized area of lung tissue, autoregulatory mechanisms are invoked. If airflow is low and blood flow too high, arteriolar vasoconstriction occurs to redirect blood to areas of better ventilation. Therefore, both options A and C occur. The autonomic nervous system is not directly involved in this process, so option B is incorrect.

When the Level of Blood Flow Is Not Ideally Matched