endocrinology

Question 1

avg duration of female monthly cycle

Answer 1

20-45 days

Question 2

endometrial proliferation takes place during follicular or luteal phase?

Answer 2

follicular

Question 3

follicular phase is followed by____, luteal phase is followed by_____

Answer 3

ovulation; menses

Question 4

when does the corpus luteum form?

Answer 4

luteal phase

Question 5

GnRH is released in what sort of manner?

Answer 5

pulsatile

Question 6

there is a pulsatile release of LH every____

Answer 6

90 min

Question 7

FSH rises ________

Answer 7

early in follicular phase

Question 8

peak concentrations of steroids occur when?

Answer 8

right before ovulation

Question 9

where are inhibin A & B synthesized?

Answer 9

granulosa cells of ovary

Question 10

inhibin A is secreted from____, Inhibin B is secreted from____

Answer 10

corpus luteum; granulosa cells

Question 11

inhibin B regulates ant pit to decr secretion of_____

Answer 11

FSH

Question 12

follicular phase is associated with_____synthesis

Answer 12

estrogen

Question 13

during the follicular phase, proliferation of the uterin endometrium is regulated by?

Answer 13

estrogen

Question 14

what induces ovulation?

Answer 14

the surge of FSH & LH at day 14

Question 15

what hormone is absoultely req’d for ovulation?

Answer 15

LH

Question 16

what is a temporary endocrine gland?

Answer 16

corpus luteum

Question 17

when does the corpus luteum reach a mature state?

Answer 17

7-8 days following ovulation

Question 18

what is the regulatory hormone of steroid synthesis in luteal phase?

Answer 18

LH

Question 19

what is the regulatory hormone of steroid synthesis in follicular phase?

Answer 19

LH & FSH

Question 20

differentiation of the uterine endometrium is regulated by?

Answer 20

progesterone

Question 21

what exerts negative feedback at the end of the luteal pahse?

Answer 21

1. progesterone

2. inhibin A

Question 22

break down of the zona pellucida

Answer 22

hatching

Question 23

trophoblastic cells of the blastocyst makes contact with endometrium

Answer 23

apposition

Question 24

trophoblasts differentiates into (2)

Answer 24

1. cytotrophoblasts

2. syncytiotrophoblasts

Question 25

what cell types sends out protrusions and invades the endometrium

Answer 25

syncytiotrophoblasts

Question 26

what stimualtes ovarian steroidogenesis for 1st 8 weeks after implantation?

Answer 26

HcG

Question 27

when does hcg production peak?

Answer 27

10 weeks

Question 28

think of what hormone for growth, development, metabolism of fetus?

Answer 28

hpl

Question 29

what happens to hpl over the course of pregnancy?

Answer 29

increases

Question 30

_______produce both Hcg and hpl

Answer 30

syncytiotrophoblasts

Question 31

hpl starts getting secreted at ______

Answer 31

6 weeks

Question 32

CRH is produced by _____and____

Answer 32

syncytiotrophoblasts and trophoblasts

Question 33

what hormone induces the onset of labor and PG production?

Answer 33

CRH

Question 34

what hormone inhibs PG production and suppresses uterine contraction?

Answer 34

progesteron and 17-OH progesterone

Question 35

what provides substrates for estrogen synthesis?

Answer 35

DHEA