★ Vessels Quiz
A muscle that is being regularly contracted during exercise will attract blood flow by dilating arterioles. Which of these factors would contribute to this effect?
A. heat loss from the muscle
B. increased levels of carbon dioxide
C. an increase in sympathetic tone
D. increased levels of oxygen
Preview next quiz:
Which of the following is NOT a vasoconstrictor?
A. ANP
B. norepinephrine
C. antidiuretic hormone
D. Angiotensin II
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