Adrenal glands. Functions of the mineralocorticoids. Regulation of mineralocorticoid secretion. Adrenal androgens.

Question 1

Functions of the mineralocorticoids - 1

Answer 1

RAAS
+ aldosterone is released

Question 2

Functions of the mineralocorticoids - 2

Answer 2

aldosterone increases sodium reabsorption from the urine back into blood
- increases blood pressure
- increases blood volume

Question 3

Functions of the mineralocorticoids - 3

Answer 3

aldosterone increases excretion of potassium into urine
to prevent hyperkelemia

Question 4

Functions of the mineralocorticoids - 4

Answer 4

aldosterone can excrete hydrogen ions into urine for acid-base balance

Question 5

Functions of the mineralocorticoids - 5

Answer 5

acid-base balance

secretes h+ ions into urine
regulate pH by preventing acid build up

Question 6

Regulation of mineralocorticoid secretion - 1

Answer 6

ACTH from pituitary gland + adrenal cortex receptors = aldosterone synthesis

Question 7

Regulation of mineralocorticoid secretion - 2

Answer 7

ANP

ANP released from atria in response to elevated blood volume/ pressure

ANP inhibits aldosterone action

ANP promotes sodium retention/ water excretion = reducing blood pressure/ volume

Question 8

adrenal androgens - 1

Answer 8

a group of steroid hormones such as dehydro-epi-androsterone + andro-stene-dione

which are converted into active sex steroids - estrogen/ androgen

Question 9

adrenal androgens - men

Answer 9

secondary sexual characteristics

= produce testosterone
- pubic/ axillary hair
- voice deepening

Question 10

adrenal androgens - women

Answer 10

secondary sexual characteristics

= produce estradiol
- hips widen
- breast develop
- menstruation begins

imbalance = PCOS