- A Low sodium concentration in the blood under most conditions studied
- B Increased blood volume stretching the atrial wall
- C A drop in overall blood volume as widely reported
- D A drop in systemic blood pressure in standard reference material
Correct answer: B. Increased blood volume stretching the atrial wall
Explanation: Increased blood volume stretches the atria, triggering ANF release, which dilates blood vessels and reduces blood pressure, acting as a check on the renin-angiotensin system.
Concept context
Nitrogenous waste, kidney structure, urine formation in the nephron, and hormonal regulation of excretion.
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