Renal regulation of sodium, potassium, calcium, phosphate and magnesium

Question 1

Renal regulation of sodium, potassium, calcium, phosphate and magnesium

1

Answer 1

describe process
filtration -> reabsorption -> secretion

Question 2

Renal regulation of sodium -

Answer 2

PCT = 70%

loop of henle = TAL 20%

DCT = 5%

CD = 3%

Question 3

Renal regulation of sodium - hormonal

Answer 3

RAAS
ANP

Question 4

Renal regulation of
potassium

Answer 4

PCT - passively reabsorbed (65%)

CD = actively secreted

Question 5

Renal regulation of
potassium - hormonal

Answer 5

aldosterone

increases potassium channels amount = increases potassium secretion in collecting ducts

Question 6

Renal regulation of
calcium

Answer 6

reabsorption

PCT - 65%
Loop of henle - 25%
DCT - 10%

Question 7

Renal regulation of
calcium - hormonal

Answer 7

PTH
calcitonin
vitamin D

Question 8

Renal regulation of
phosphate

Answer 8

PCT - active reabsorption
- sodium-phosphate cotransporters
- sodium conc gradient

Question 9

Renal regulation of
phosphate - hormone

Answer 9

PCT
fibroblast growth factor 23
vitamin D

Question 10

Renal regulation of
magnesium

Answer 10

reabsorption

• PCT = 70% = passive
• TAL = 20% = active
• DCT = 10% = TRPM6/7

Question 11

Renal regulation of
magnesium - hormonal

Answer 11

PTH
aldosterone
RAAS