Which statement regarding the juxtaglomerular apparatus is NOT true?
A) It secretes renin in response to sodium depletion or plasma volume reduction.
B) It is a thickened region of specialized cells at a point where the distal tubule comes into intimate contact with the afferent and efferent arterioles of the same nephron.
C) It is where reabsorption of sodium occurs.

Question

Quizplus · Accepted Answer

The juxtaglomerular apparatus is not where reabsorption of sodium occurs. Rather, it is responsible for regulating sodium balance by secreting renin in response to sodium depletion or volume reduction. The apparatus is a specialized region consisting of three distinct cell types where the distal tubule comes into contact with the afferent and efferent arterioles of the same nephron.

Which Statement Regarding the Juxtaglomerular Apparatus Is NOT True