Multiple Choice
Which of the following statements about the response of arteriolar smooth muscle to changing oxygen partial pressures is TRUE?
A) Both systemic and pulmonary arterioles respond to a decrease in PO₂ by constricting.
B) Both systemic and pulmonary arterioles respond to a decrease in PO₂ by dilating.
C) Systemic arterioles respond to a decrease in PO₂ by dilating,but pulmonary arterioles constrict in response to decreased PO₂.
D) Systemic arterioles respond to a decrease in PO₂ by constricting,but pulmonary arterioles dilate in response to decreased PO₂.
E) Changes in PO₂ do not affect arteriolar smooth muscle in the pulmonary system.
Correct Answer:
Verified
Correct Answer:
Verified
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