What do low Renin and Aldosterone levels cause?
It’s B. Aldosterone causes reabsorbtion of sodium from the kidneys, which also results in increased water reabsorbtion. Decreased aldosterone levels can lead to hyponatremia (possible explaining the weakness) and excess water loss through urination due to an impaired ability to re-absorb water. Renin causes converson of angiotensinogen to angiotensin I, after which angiontensin-converting enzyme converts ATI to ATII, the active form of AT. Thus, decreased renin levels would lead to decreased ATII by decreasing the amount of availible ATI. Since ATII is responsible for vasoconstriction in order to regulate blood pressure, she likely suffers from low blood pressure as well (another possible cause of weakness).
