Which of the Following Statements About the Response of Arteriolar

question 1

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.

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