Blood flow to a tissue will increase if the?

A) arterioles dilate.
B) level of oxygen at the tissue increases.
C) level of carbon dioxide at the tissue decreases.
D) vein constrict.
E) both C and D
Answers:
Is the entire class doing their homework on YA?

A is the correct answer.

Decreased CO2----->vasoconstriction of arteries and arterioles
Increased pO2------> same, less potent
Veins constrict- blood needs someplace to go-- decreased flow.
appreciably A

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