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Renin released by JG cells acts to
AInhibit aldosterone secretion in adrenal
BDecrease blood flow to glomerulus
CRestore the falling glomerular filtration
DPromote loss of sodium in urine
Answer & Solution
Correct answer: C. Restore the falling glomerular filtration
Renin initiates the RAA cascade: angiotensinogen → angiotensin I → angiotensin II → vasoconstriction + aldosterone release. The net effect is raised systemic BP and glomerular perfusion, restoring GFR.
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