Chapter 26: Renal Function

Chapter 26: Renal Function

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE
1. The primary selectivity barrier for glomerular filtration is the
a. glomerular basement membrane.
b. endothelial tight junctions.
c. epithelial fenestra.
d. mesangial cells.
ANS: A
The basement membrane is an important selectivity barrier of the glomerulus, preventing plasma proteins, RBCs, WBCs, and
platelets from passing through the glomerulus. Endothelial tight junctions, epithelial fenestra, and mesangial cells are not the
primary selectivity barriers for glomerular filtration.
REF: Pg. 555
2. The glucose transporter in the proximal tubule
a. has no transport maximum.
b. does not depend on sodium reabsorption.
c. is ATP dependent.
d. may be saturated at high filtered glucose loads.
ANS: D
The glucose transporter in the proximal tubule may be saturated at high filtered glucose loads; glycosuria then results. A transport
maximum does exist beyond which glycosuria occurs. A sodium-dependent protein co-transporter is needed. The transporter is not
ATP-dependent.
REF: Pgs. 563-564
3. The primary function of the vasa recta is to
a. secrete renin.
b. reabsorb NaCl.
c. reabsorb interstitial fluid.
d. secrete urea.
ANS: C
The vasa recta are capillaries that surround the loops of Henle and collecting ducts and absorb interstitial fluid. The vasa recta do
not secrete rennin or urea, nor do they reabsorb NaCl.
REF: Pg. 551
4. Approximately two-thirds of the water and electrolytes filtered by the kidney are reabsorbed by the
a. loop of Henle.
b. collecting tubule.
c. distal tubule.
d. proximal tubule.
ANS: D
Approximately two-thirds of the water and electrolytes filtered by the kidney are reabsorbed by the proximal tubule. Two-thirds of
the water and electrolytes filtered by the kidney are not reabsorbed by the loop of Henle, collecting tubule, or distal tubule.