Aug31 M3-Week 1 Review

Question 1

which enzyme makes testo into estrogen

Answer 1

aromatase

Question 2

deficiency of 21-alpha hydroxylase causes what

Answer 2

congenital adrenal hyperplasia. 2 types

1. early. classical, born with it, ambiguous genitalia from high androgen + salt wasting. dx at birth
2. late onset. some enzyme fct. sx = acne, hirsutism, irregular cycles, virilization

Question 3

hormones from post pit

Answer 3

oxytocin and vasopressin

Question 4

in the endometrium, follicular phase is to the _______ what the luteal phase is to the secretory phase

Answer 4

proliferative

Question 5

how sex steroids act (mech of action)

Answer 5

enhance transcription when bound to Rs

Question 6

what stimulates the production of progesterone by the corpus luteum

Answer 6

LH

Question 7

why pituitary hormone increases if the communication from the hypothalamus is severed

Answer 7

prolactin (bc dopamine of H inhibits prolactin of pit)

Question 8

which hormone inhibits the secretion of FSH?

Answer 8

Inhibin

Question 9

which hormone stims prod of FSH

Answer 9

activin (prod by ovary)

Question 10

inhibin B specific effect and comes from where

Answer 10

• produced with estrogen

- diminishes FSH prod

Question 11

name of undiff spermatogenic cells

Answer 11

spermatogonia

Question 12

normal conc of spermatozoa in a sperm analysis

Answer 12

normal is above 15 million per mL

Question 13

normal motility %

Answer 13

above 32%

Question 14

% of sperms that should have a normal form

Answer 14

4%

Question 15

male gametes: what cell undergoes meiotic division to give haploid cells

Answer 15

primary spermatocytes

Question 16

parts of the spermatic cord

Answer 16

• vas
• testicular a and v
• lymphatic vessels
• *NOT ejaculatory duct

Question 17

vasectomies = what organ

Answer 17

ligate vas deferens

Question 18

function of fructose in semen

Answer 18

provide an energy source for ATP production by sperm