Renin release
A drop in blood pressure in the afferent arteriole triggers renin release from which cells?
Answer C: explanation for every choice
A
Macula densa cells sense NaCl in the distal tubule and signal to the juxtaglomerular cells, but they don't secrete renin.
B
Podocytes form the filtration barrier.
C
Correct. Juxtaglomerular cells in the afferent arteriole wall sense pressure and secrete renin.
D
Principal cells respond to aldosterone and ADH.
TakeawayJuxtaglomerular cells secrete renin. The macula densa senses NaCl.
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Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID bb147.