Physiology of the Nephron

Question 1

Excretion vs. Secretion

Answer 1

Excretion- completely removing material from a living thing

Secretion- moving material from one point to another

Question 2

What part of the nephron performs filtration?

Answer 2

Renal corpuscle

Question 3

What part of the nephron performs reabsorption?

Answer 3

renal tubule and conducting duct

Question 4

What part of the nephron performs secretion?

Answer 4

renal corpuscle and conducting duct

Question 5

What is filtered in the renal corpuscle?

Answer 5

blood plasma

Question 6

What does blood plasma become after it is filtered in the renal corpuscle?

Answer 6

filtrate

Question 7

What is reabsorbed in the proximal distal tubule of the renal tubule?

Answer 7

• H2O

- 100% of glucose, amino acids, lactic acids and water-soluble vitamins

Question 8

What happens to the filtrate osmolarity in the PCT?

Answer 8

stays the same

Question 9

What is reabsorbed in the descending limb of loop of henle?

Answer 9

H2O (no solutes)

Question 10

What happens to the filtrate osmolarity in the descending limb?

Answer 10

increases

Question 11

What is reabsorbed in the ascending limb of the loop of henle?

Answer 11

solutes: Na+ and Cl- (no H2O)

Question 12

What happens to the filtrate osmolarity in the ascending limb?

Answer 12

decreases

Question 13

What is reabsorbed in the distal convoluted tubule?

Answer 13

Na+ and Cl- then H2O by osmosis

Question 14

What happens to the filtrate osmolarity in the DCT?

Answer 14

stays the same

Question 15

What is reabsorbed in the late DCT and collecting ducts?

Answer 15

Na+, Cl- and H2O

Question 16

What could effect the levels of reabsorption in the late DCT and collecting ducts?

Answer 16

ADH and aldosterone

Question 17

What effect does ADH have on the late DCT and CD?

Answer 17

adds aquaporins to increase the reabsorption of H2O

Question 18

What is secreted in the late DCT and CD?

Answer 18

K+