Physiology - from Ganong's 23rd ed Chapter 39 - Regulation of ECF Flashcards
Dehydration increases the plasma concentration of all of the following hormones EXCEPT: A) Vasopressin B) Angiotensin II C) Aldosterone D) Norepinephrine E) Atrial Natriuretic Peptide
E.
In a patient who has become dehydrated, body water should be replaced by intravenous infusion of A) Distilled water B) 0.9% NaCl C) 5% glucose D) hyperoncotic albumin E) 10% glucose solution
C
Renin is secreted by A) cells in the macula densa B) cells in the proximal tubules C) cells in the distal tubules D) juxtaglomerular apparatus E) cells in the peritubular capillary bed
D
Erythropoietin is secreted by A) cells in the macula densa B) cells in the proximal tubules C) cells in the distal tubules D) juxtaglomerular apparatus E) cells in the peritubular capillary bed
E
When a woman who has been on a low-sodium diet for 8 days is given an IV injection of captopril, a drug that inhibits ACE, one would expect
A) her BP to rise because her cardiac output would fall
B) her BP to rise because her peripheral resistance would fall
C) her BP to fall because her cardiac output would fall
D) her BP to fall because her peripheral resistance would fall
E) her plasma renin activity to fall because her circulating angiotensin I level would rise.
D
Which of the following would NOT be expected to increase renin secretion?
A) administration of a drug that blocks ACE
B) administration of a drug that blocks AT1 receptors
C) administration of a drug that blocks beta-adrenergic receptors
D) constriction of the aorta between the celiac artery and the renal arteries
E) administration of a drug that reduces ECF volume
C
Which of the following is LEAST likely to contribute to the beneficial effects of ACE inhibitors in the treatment of congestive heart failure? A) vasodilation B) decreased cardiac growth C) decreased cardiac afterload D) increased plasma renin activity E) decreased plasma aldosterone
D
