7 HP Axis pt. 4

Question 1

which hormones are released by the posterior pituitary?

Answer 1

oxytocin, ADH

Question 2

which hormones are released by the anterior pituitary?

Answer 2

TSH, ACTH, FSH, LH, GH, PRL, endorphins

Question 3

which nucleus produces oxytocin?

Answer 3

paraventricular nucleus (PVN)

Question 4

which nucleus produces ADH?

Answer 4

supraocular nucleus (SON)

Question 5

what’s desmopressin?

Answer 5

the synthetic version of vasopressin

Question 6

how many peptides make up pituitary hormones?

Answer 6

9 - they’re nonapeptides

Question 7

pituitary hormones make what kind of structure?

Answer 7

ring (disulfide bridge between 1st and 6th AA)

Question 8

functions of oxytocin?

Answer 8

contraction of smooth muscle cells in:

• alveoli
• uterus

Question 9

functions of ADH?

Answer 9

regulates blood volume and pressure by

• regulating water retention in kidney
• regulating contraction of blood vessels

Question 10

true or false: ADH has 2 receptors it can use

Answer 10

true

Question 11

is vasopressin a positive or negative regulator of ACTH?

Answer 11

positive

Question 12

what’s osmolality?

Answer 12

concentration of solute in a kg of solvent

Question 13

how is osmolality regulated?

Answer 13

osmostat in hypothalamus.

• controls conservation of water
• regulates [Na] in plasma
• pressure-volume involving baroreceptors

Question 14

how is thirst regulated?

Answer 14

renin-angiotensin system and aldosterone