The organ that secretes the hormone atrial natriuretic peptide (ANP) is the: MCQ with Answer and Explanation

The organ that secretes the hormone atrial natriuretic peptide (ANP) is the:
A. Adrenal gland
B. Liver
C. Kidney
D. Heart
Answer: Option D
Solution (By JKSSB Mock Tests)
ANP is secreted by atrial muscle cells of the heart in response to stretching (high blood volume). It promotes sodium and water excretion, lowering blood pressure. Kidneys secrete renin, adrenal aldosterone, liver angiotensinogen.

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