Aldosterone secretion is increased when there is a fall in____________?
Correct answer: B. Plasma Na+
- A. Plasma K+
- B. Plasma Na+
- C. pH of the plasma
- D. Angiotensin II level
Explanation
A fall in plasma sodium reduces effective circulating volume and activates renin, angiotensin II and aldosterone secretion to promote sodium retention. Plasma potassium stimulates aldosterone when it rises, not when it falls.
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