A hemorrhage -induced decrease in mean arterial pressure will decrease glomerular filtration rate by intrinsic and extrinsic mechanisms; the extrinsic mechanisms act through
A) myogenic responses.
B) the sympathetic nervous system.
C) the parasympathetic nervous system.
D) tubuloglomerular feedback.
E) mesangial cells.

Question

Quizplus · Accepted Answer

The extrinsic mechanism that decreases glomerular filtration rate (GFR) in response to a hemorrhage-induced decrease in mean arterial pressure primarily involves the sympathetic nervous system. This system activates in response to decreased blood pressure, leading to vasoconstriction of afferent arterioles, which in turn reduces GFR as part of the body's effort to conserve blood volume and maintain blood pressure.

A Hemorrhage -Induced Decrease in Mean Arterial Pressure Will Decrease