hormones of renal physio

Question 1

ADH

Answer 1

Acts on collecting ducts.
Increases aquaporin insertion.

Triggered due to high osmolality detected in hypothalamus.

Question 2

aldosterone

Answer 2

Acts on collecting ducts.
Increases K+ secretion, Na+ reabsorption.

Triggered due to increased renin (increased renin due to low solute detected by macula densa // low bp detected by JG cells)

Question 3

renin

Answer 3

Increases reabsorption of Na+ in PCT.
Increases secretion of ADH, aldosterone (to increase BP).
Released from JG cells.

Triggered by low bp detected by JG cells.
Triggered by low solute concentration detected by macula densa.

Question 4

ANP

Answer 4

Triggered by high blood pressure.
Effect: lower blood pressure.
-inhibit ADH secretion
-inhibit aldosterone secretion
-inhibit renin secretion

Question 5

SNA (sympathetic nerve activity)

Answer 5

Increases Na+ reabsorption in PCT.

Question 6

calcitriol

Answer 6

Increases Ca++ reabsorption in DCT.

Increases Ca++ absorption in gut.

Question 7

PTH

Answer 7

Increases Ca++ reabsorption in DCT.