Filtration rate in the glomerulus is increased by
A)vasodilation of the afferent arteriole only.
B)vasoconstriction of the efferent arteriole only.
C)both vasodilation and vasoconstriction of the efferent arteriole.
D)both vasodilation of the afferent arteriole and vasoconstriction of the efferent arteriole.

Question

Quizplus · Accepted Answer

The filtration rate in the glomerulus is dependent on the blood flow into and out of the glomerulus. Vasodilation of the afferent arteriole increases blood flow into the glomerulus, whereas vasoconstriction of the efferent arteriole decreases blood flow out of the glomerulus. Therefore, both vasodilation of the afferent arteriole and vasoconstriction of the efferent arteriole will increase the filtration rate in the glomerulus. Therefore, the best choice is D.

Filtration Rate in the Glomerulus Is Increased by