When educating a group of nursing students on the mechanism of action of angiotensin-converting enzyme inhibitor (ACEI) drugs, the instructor identifies which of the following as the action brought about by aldosterone?
A) Inhibits renin secretion
B) Causes sodium and water retention
C) Causes excess potassium retention
D) Promotes angiotensin I conversion
Ans: B
Feedback:
Aldosterone causes retention of sodium and water. This in turn causes a rise in blood pressure. ACEIs act by inhibiting the conversion of angiotensin I to angiotensin II. Aldosterone does not inhibit the release of renin and is not involved in the retention of potassium. Angiotensin-converting enzymes, and not aldosterone, are involved in the conversion of angiotensin I to angiotensin II.
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