Question

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multiple choice question
one component of the juxtaglomerular apparatus is which of the following?
renal papilla
efferent arteriole
granular cells
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Explanation:

The juxtaglomerular apparatus has three main components: macula densa (part of the distal convoluted tubule), extraglomerular mesangial cells, and granular cells (also known as juxtaglomerular cells) in the wall of the afferent arteriole. The renal papilla is part of the renal pyramid (not the juxtaglomerular apparatus). The efferent arteriole is not a component of the juxtaglomerular apparatus. Granular cells secrete renin and are a key component of the juxtaglomerular apparatus.

Answer:

granular cells