Physiology Quiz -
Renal Physiology - Part 1

The kidneys are of outstanding importance. They perform a number of homeostatic functions including filtration of plasma and elimination of metabolic waste products, regulation of the composition and volume of the extracellular fluid, and regulation of blood pressure. The kidneys are also endocrine organs. Test your basic knowledge of renal physiology by taking this simple quiz.

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(1) Which of the following is (are) responsible for the high glomerular filtration rate (GFR) exhibited by vertebrate animals (e.g., humans)?

	(A) High blood hydrostatic pressures in the glomerular capillaries
	(B) High permeability of the glomerular capillaries
	(C) High hydrostatic pressure of the fluid in the Bowman's capsule
	(D) The renin-angiotensin-aldosterone system
	(E) High rate of water reabsorption across the walls of the proximal tubules

(2) Most of the reabsorbed water in the kidney is reabsorbed across the walls of the:

	(A) Proximal tubules
	(B) Ascending limb of the loop of Henle
	(C) Descending limb of the loop of Henle
	(D) Distal tubules
	(E) Collecting ducts

(3) In order for plasma to be filtered across the glomerular capillaries, the ultrafiltrate must go through the following physical barriers:

	(A) Glycocalyx covering the luminal surface of endothelial cells of the glomerular capillaries
	(B) Fenestrae of endothelial cells of the glomerular capillaries
	(C) Basement membrane of the glomerular capillary endothelial cells
	(D) Slit diaphragms of filtration slits formed by foot processes of Bowman's capsule epithelial cells (podocytes)
	(E) Fenestrae of epithelial cells (podocytes) of the Bowman's capsule

(4) Which one of the following sequence of blood flow through the nephron ultrastructure is correct?

	(A) Afferent arteriole → glomerular capillary → peritubular capillaries/vasa recta → efferent arteriole
	(B) Efferent arteriole → glomerular capillary → afferent arteriole → peritubular capillaries/vasa recta
	(C) Afferent arteriole → peritubular capillaries/vasa recta → glomerular capillary → efferent arteriole
	(D) Afferent arteriole → glomerular capillary → efferent arteriole → peritubular capillaries/vasa recta
	(E) Glomerular capillaries → afferent arteriole → efferent arteriole → peritubular capillaries/vasa recta

(5) The blood-to-urine barrier (also referred to as the glomerular filtration barrier) allows the passage of molecules of up to:

	(A) 400 Daltons
	(B) 4,000 Daltons
	(C) 40,000 Daltons
	(D) 400,000 Daltons
	(E) 4,000,000 Daltons

Checking your answers...

Posted: Tuesday, December 15, 2015
Last updated: Tuesday, March 11, 2025

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Physiology Quiz -Renal Physiology - Part 1

Physiology Quiz -
Renal Physiology - Part 1