Peripheral resistance is the resistance blood encounters in the
A)veins.
B)arteries.
C)venules.
D)arterioles.
E)heart.

Question

Quizplus · Accepted Answer

Arterioles are the small vessels that regulate blood flow and therefore the resistance that the blood encounters as it travels through the peripheral tissues. The resistance is related to the diameter of the arterioles and the tone of their smooth muscle cells. When the arterioles constrict, the resistance increases and when they dilate, the resistance decreases. Therefore, arterioles are the key regulators of peripheral resistance.

Peripheral Resistance Is the Resistance Blood Encounters in the