The myogenic mechanism acts to restore the glomerular filtration rate (GFR)by changing:
A)blood pH.
B)tubular secretion of metabolic wastes.
C)vessel diameter.
D)blood pressure.

Question

Quizplus · Accepted Answer

The myogenic mechanism is a built-in feedback system that helps to regulate the GFR by controlling the diameter of the afferent arteriole. If arterial pressure rises, the afferent arterioles constrict, reducing blood flow into the glomerulus, and protecting the capillaries from damage caused by high pressures. If arterial pressure drops, the afferent arterioles dilate, increasing blood flow into the glomerulus and maintaining the GFR. Therefore, vessel diameter is the mechanism that is changed to restore the GFR in the myogenic mechanism.

The Myogenic Mechanism Acts to Restore the Glomerular Filtration Rate