Question

If blood flow through the afferent arterioles increases:

a. the smooth muscle in the vessel walls stretches to accommodate.
b. the increased flow and the stretch stimulates further relaxation of the arteriolar wall, lessening blood pressure.
c. the stretch stimulates further relaxation of the arteriolar wall, lessening blood pressure.
d. stretch stimulates vasoconstriction to reduce the flow.
e. the smooth muscle in the vessel walls stretches to accommodate the increased flow.

Answer 1

d. stretch stimulates vasoconstriction to reduce the flow.

Step-by-step explanation:

Afferent arterioles are a network of blood vessels that supplies the kidneys with blood. They branch from the renal artery and are important in blood regulation.

Myogenic mechanism is used to regulate blood flow to the kidney.

When blood flow increases to the afferent aterioles the smooth muscles its wall stretches and contracts to resist the pressure. This reduces blood pressure.

When the pressure reduces the smooth muscles relax to allow more flow of blood.