Question

6a. Which of the following decreases the osmotic pressure in peritubular capillary along the proximal convoluted tubule?

A. Efficient reabsorption of glucose
B. Low reabsorption of sodium
C. High protein concentration in blood after the glomerular filtration.

D. None of above would decrease it.

6b. Between glomerular capillary and peritubular capillary along the proximal convoluted tubule, which one has higher outward hydrostatic pressure in a healthy person?

A. glomerular capillary

B. peritubular capillary along the proximal convoluted tubule

C. They have the same outward hydrostatic pressure.

D. It depends on the protein level in plasma.

Answer 1

6a) Answer - B ( Low reabsorption of sodium)

Explanation - Osmotic pressure depends upon the solute concentration, if reabsorption of Sodium is decrased, osmotic pressure will decrease in peritubular capillary.

6b) Answer - A ( glomerular capillary )

Explanation - As hydrostatic pressure is force generated by flowing plasma on the walls of capillary. And efferent arteriolar diameter is smaller than afferent arteriolar diameter, hence more hydrostatic pressure is generated in glomerular capillary.