Renal Phys ML: 3

Question 1

Amount of water filtered per day

Answer 1

180 L

Question 2

Amount of water excreted per day

Answer 2

1.8L

Question 3

Percent of water absorbed

Answer 3

99%

Question 4

Amount of sodium filtered per day

Answer 4

630 g

Question 5

Amount of sodium excreted per day

Answer 5

3.2 g

Question 6

Percent of sodium absorbed

Answer 6

9.5%

Question 7

Amount of glucose filtered per day

Answer 7

180 g

Question 8

Amount of glucose excreted per day

Answer 8

0

Question 9

Percent of glucose absorbed

Answer 9

100%

Question 10

Amount of urea filtered per day

Answer 10

54g

Question 11

Amount of urea excreted per day

Answer 11

30 g

Question 12

Percent of urea reabsorbed

Answer 12

44%

Question 13

What are the two modes of tubular reabsorption

Answer 13

diffusion- lipid soluble substances that dont need carriers
mediated transport: large/charged substances

Question 14

Transcellular route

Answer 14

• apical (luminal) membrane
  -basolateral membrane
  -renal interstitial fluid
• Peritubular capillaries

Question 15

Paracellular route

Answer 15

-tight junctions
-renal interstitial fluid
-peritubilar capillaries

Question 16

True or false; tight junctions vary by region

Answer 16

true

Question 17

What happens when the max transport is reached for glucose absorption

Answer 17

starts showing up in the urine

Question 18

Reabsorption keeps up with filtration at ____ plasma concentrations

Answer 18

low

Question 19

Tubular secretion

Answer 19

from bloodstream to nephron

Question 20

What substances use tubular secretion

Answer 20

foregin chemicals, drugs and toxins, hormones, breakdown products, organic wastes, H+ and K+

Question 21

What moves in opposite directions during tubular secretion

Answer 21

transcellular and paracellular routes

Question 22

Where does most secretion occur

Answer 22

proximal tubules

Question 23

Where are K+ and H+ mainly secreted

Answer 23

cortical collecting duct

Question 24

True or false: secreted substances have a transport maximum too

Answer 24

true