1 2 3 4 5

and small solutes but impermeable to protein and blood cells and put in contact with a solution similar in composition to normal blood plasma. Four of the components of plasma are NaCl, glucose, urea and potassium. Which should be at the same concentration as normal plasma and which should be at lower a concentration?

Bowman's capsule
6. How does the composition of glomerular filtrate compare with that of plasma?

7. What effect would a decease in blood pressure have on the amount of fluid filtered by
the glomerulus?

Proximal tubule
8. What is the change in filtrate volume and osmolarity during passage through the
proximal tubule?

9. Some diuretics inhibit the secretion of protons in the proximal tubule; how would that
affect the reabsorption of sodium and water (see handout)?

Loop of Henle
10. What is the function of the loop of Henle (how does it make your kidneys different
from a frog's)?