If the afferent arteriole becomes constricted,
A) blood flow into the efferent arteriole will increase.
B) GFR will decrease.
C) GFR will increase.
D) hydrostatic pressure in the glomerulus will increase.
E) the protein concentration in the filtrate will increase.

Question

Quizplus · Accepted Answer

Constriction of the afferent arteriole will decrease the blood flow into the glomerulus, ultimately decreasing the GFR (glomerular filtration rate). This is because the constriction will increase resistance, which in turn will lower the hydrostatic pressure in the glomerulus and reduce the filtration pressure. As a result, less filtrate will be produced and the GFR will decrease.

If the Afferent Arteriole Becomes Constricted