Why are vasodilation and vasoconstriction the main mechanisms to change blood flow?

A. Sympathetic activation has no effect on blood flow.
B. Leakage of fluids from the capillaries has no effect on blood flow.
C. Blood hematocrit has no effect on blood flow.
D. Blood vessel length is relatively fixed and has no effect on blood flow.


Answer: D

Biology & Microbiology

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