The juxtaglomerular apparatus
A) secretes renin in response to sodium depletion or plasma volume reduction.
B) 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) is where reabsorption of sodium occurs.
D) both (a) and (b) above.
E) all of these answers.

Question

Quizplus · Accepted Answer

The juxtaglomerular apparatus is a specialized region where the distal tubule comes into contact with the afferent and efferent arterioles of the same nephron. It is responsible for secreting renin in response to sodium depletion or plasma volume reduction. Therefore, choices A and B are correct, making option D the best choice. Choice C is incorrect as reabsorption of sodium occurs primarily in the proximal tubule.

The Juxtaglomerular Apparatus