alleryRenin is secreted by:
AJuxtaglomerular cells of afferent arteriole when BP/Na+ low
BStomach
CLiver
DAdrenal
Answer & Solution
Correct answer: A. Juxtaglomerular cells of afferent arteriole when BP/Na+ low
JG cells (modified smooth muscle of afferent arteriole): release renin in response to low renal BP, low Na+ at macula densa, or sympathetic stimulation.
Renin cleaves angiotensinogen
→ angiotensin I → (via ACE) angiotensin II
→ vasoconstriction + aldosterone. RAAS pathway.
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