Tag: CSIR NET Life Science Previous Year Questions and Solution on Excretory System

Which one of the following factors inhibits rennin secretion ? (1) Increased level of plasma catecholamines. (2) Increased blood pressure in the afferent arterioles leading to glomerulus. (3) Increased activity […]

Which one of the following is NOT a function of angiotensin ll? (1) Facilitates the release of norepinephrine from post- ganglionic sympathetic neurons (2) Increases the sensitivity of baroreflex by […]

Certain statements made on the mechanisms of action of a neuro-hormone, vasopressin (VP) are given below: A. VP acts on collecting ducts of kidney to concentrate urine by binding to […]

Substrate for Renin, also called angiotensinogenase, is (1) Angiotensinogen (2) Angiotensis l (3) Angiotensin ll (4) Renin Renin, also known as angiotensinogenase, is a crucial enzyme produced and released primarily […]

After severe diarrhoea, the plasma K+ concentration became low (i.e, hypokalemia developed) in a human subject. The following statements are proposed to explain the mechanism of plasma K+ regulation by […]

Aldosterone increases the reabsorption of Na+ from the tubular fluid in the thick ascending limb of loop of Henle and in the distal tubule. These effects are explained in the […]

Which one is NOT the function of P-cells in the collecting ducts? (1) Na+ reabsorption (2) K+ secretion (3) H2O reabsorption (4) H+ secretion The kidney’s collecting ducts play a […]

The mechanisms of regulation of H+ secretion by kidneys in acidosis have been suggested in the following statements: A. Acidosis inhibits the secretion of cortisol by adrenal cortex B. The […]

In kidney, Na+ is reabsorbed across the second half of proximal tubule due to positive transepithelial voltage (i.e., tubular fluid becomes positive relative to blood) and by other mechanisms. The […]

Desert animals have longer loop of Henle compared to that of humans. It may be due to the following reasons: A. Long loop of Henle is associated with greater amount […]