Multiple Choice
Imagine that you are about to give blood for the first time. While watching other donors around you, you become pale and have to sit down before you faint. Which vessels constricted to produce this nervous side effect?
A) Venules
B) Veins
C) Capillaries
D) Arterioles
E) Arteries
Correct Answer:
Verified
Correct Answer:
Verified
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