Hypothalamus-Adrenal Axis (HPA)

Question 1

Functions of aldosterone.

Answer 1

Acts on DCT.
principal cells.
Increases sodium potassium ATPase pump.
Increases sodium in blood.
decreases potassium in blood.
Increases potassium in urine.
Decreases sodium in urine.

Question 2

What exists in zona glomerulosa?

Answer 2

Mineralcorticoids such as aldosterone.

Question 3

What exists in zona fasciulata?

Answer 3

Glucocorticoids such as cortisol.

Question 4

What exists in zona reticularis?

Answer 4

Androgens such as DHEA and androstenedione.

Question 5

Function of cortisol

Answer 5

1.) liver elevates blood glucose
2.) Glut4 transporters blocked in muscle
3.) WBCs decreased and inflammation decreases
4.) immune defense decreased

Question 6

Low sodium or high potassium in blood causes what?

Answer 6

Release of renin from JG cells.

Question 7

What converts angiotensinogen to angiotension I ?

Answer 7

Renin

Question 8

What converts angiotension I to angiotension II?

Answer 8

ACE

Question 9

What causes release of aldosterone?

Answer 9

Angiotensin II

Question 10

How else can aldosterone be released besides due to chronic stress?

Answer 10

By RAAS system