A client asks why his blood pressure pills seem to make him go to the bathroom to urinate frequently when they are not water pills (diuretics)

Question

Which of the following physiologic processes explains the long-term regulation of blood pressure most accurately?
A) Actions of the renin–angiotensin–aldosterone system
B) Release of antidiuretic hormone (vasopressin) by the posterior pituitary
C) Renal monitoring and adjustment of extracellular fluid volume
D) Integration and modulation of the autonomic nervous system (ANS)

Answer 1

Ans: C
Feedback:
Long-term maintenance and control of blood pressure is accomplished primarily through the renal control of fluid balance. These mechanisms function largely by regulating the blood pressure around an equilibrium point, which represents the normal pressure for a given individual. Accordingly, when the body contains too much extracellular fluid, the arterial pressure rises and the rate at which water and sodium are excreted by the kidney is increased. When blood pressure returns to its equilibrium point, water and sodium excretion returns to normal. Hormonal influences, such as those of ADH and the RAA system, and neural controls are utilized in the shorter-term control of blood pressure.