Plasma renin activity is lower than normal in patients with
(a) hemorrhagic shock
(B) essential hypertension
(C) congestive heart failure
(d) hypertension caused by aortic constriction above the renal arteries
Plasma renin activity is lower than normal in patients with:
(B) essential hypertension
In essential hypertension, there is often a state of increased blood volume and vascular resistance, which can lead to suppression of the renin-angiotensin-aldosterone system (RAAS), resulting in lower plasma renin activity.
In contrast, conditions like hemorrhagic shock, congestive heart failure, and hypertension caused by aortic constriction above the renal arteries typically lead to increased renin activity due to decreased renal perfusion or compensatory mechanisms.