Which of the Following is True of Aldosterone

Question

Which of the following is true of aldosterone?
A) It is an androgen.
B) It is the "salt-retaining" hormone.
C) It causes the tubular reabsorption of sodium, potassium, and water.
D) All of the above are true.

Accepted Answer

Aldosterone is known as the "salt-retaining" hormone because it causes the kidneys to reabsorb more sodium ions from urine back into the bloodstream while excreting more potassium ions into the urine. This leads to an increase in blood volume and blood pressure. Option A is incorrect because aldosterone is a mineralocorticoid steroid hormone, not an androgen. Option C is partially correct as aldosterone causes the reabsorption of sodium ions, but not potassium ions and water.