Renal physiology

Question 1

Where is 80% of filtrate reabsorbed

Answer 1

Proximal tubule; active and passive absorption

Question 2

How much filtrate is reabsorbed in the loop of henle?

Answer 2

6% if filtrate reabsorbed; where H20 and Salt conservation occurs

Question 3

How much filtrate is reabsorbed in the distal tubule

Answer 3

9% filtrate; variable reabsorption and active secretion occurs

Question 4

How is filtrate reabsorbed in the collecting tubule?

Answer 4

4% of filtrate is reabsorbed; Variable salt and H20 reabsorption

Question 5

Considerations for the PCT

Answer 5

water permeability is very high; water can go in and out freely

Question 6

Considerations for straight segments of proximal tubule

Answer 6

secretion and reabsorption of organic acids and bases, including uric acid and most diuretics

Question 7

Considerations for thick ascending loop of henle

Answer 7

active reabsorption of ions; very low water permeability

Question 8

distal convoluted tubule considerations

Answer 8

reabsorption under parathyroid hormone control

Question 9

collecting duct considerations

Answer 9

water reabsorption under vasopressin control