Urinary System

Question 11 - Single Best Answer

Renal blood flow influences the amount of water filtered at the glomerulus. The slower the rate, the more that is filtered. Which site influences the renal blood flow?

A) juxtaglomerular apparatus (JGA)

CORRECT!
CORRECT! It is influenced by the renin-angiotensin system. When stimulated, it allows for less filtering at the glomerulus because the afferant arterioles are constricted (there is less renal blood flow to the glomerulus). The following is a photo of the macula densa cell, a component of the JGA.