The stimulus that directly triggers release of ANP is

A. increased saltiness in the cerebrospinal fluid bathing the hypothalamus of the brain.
B. increased stretch of the heart atria.
C. decreased pressure detected by baroreceptors in the aorta and carotid arteries.
D. increased saltiness of tubular fluid in the proximal convoluted tubule.


Answer: B

Anatomy & Physiology

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