Prolactin

Question 1

prolactin

Answer 1

protein hormone from anterior pituitary that induces lactation; single chain, 4 alpha-helixes, together w/disulfide bridges

Question 2

lactation

Answer 2

produced by prolactin

Question 3

alveolus (mammary gland)

Answer 3

formed by secretory cells at base of duct network

Question 4

mammary gland secretory cell

Answer 4

grouped into lobules, form alveolus, make milk products

Question 5

myoepithelial cell

Answer 5

squeeze alveolus, push on individual secretory cells, pushes milk to ducts

Question 6

dopamine neuron (hypophysiotropic factor)

Answer 6

releases inhibitory CS

Question 7

Gi protein

Answer 7

intact when DA is not released and gated K+ channel is closed

Question 8

follicular phase

Answer 8

normal production of estrogen

Question 9

luteal phase

Answer 9

normal production of progesterone

Question 10

estrogen

Answer 10

normal production when prolactin is normal

Question 11

progesterone

Answer 11

normal production when prolactin is normal; high when pregnant

Question 12

amenorrhea

Answer 12

prolactin high, estrogen low, progesterone low

Question 13

bromocriptine

Answer 13

synthetic DA; use when high prolactin secretion

Question 14

haloperidol

Answer 14

treatment when prolactin low; DA antagonist

Question 15

testosterone

Answer 15

normal production when prolactin is normal; if low = sperm quality affected

Question 16

gynecomastia

Answer 16

prolactin high, sperm low; mammary glands in males