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Endocrinology > Physiology - Reproduction > Flashcards

Physiology - Reproduction Flashcards

1
Q

the hypothalamus secretes ____ that acts on the ________ pituitary to release __ and ___ that acts on the _______ in female or ______ in male to secrete ________ and ___________ or ___________ respectively

A

the hypothalamus secretes GnRH that acts on the ANTERIOR pituitary to release LH and FSH that acts on the OVARIES in female or TESTES in male to secrete ESTROGEN and PROGESTERONE or TESTOSTERONE respectively

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2
Q

FSH stimulates the production of what in:

(a) male
(b) female

A

FSH:

(a) male - SPERM
(b) female - OOGENESIS (GROWTH OF OVARIAN FOLLICLES) AND CAUSE OVARY TO SECRETE OESTROGEN

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3
Q

LH stimulates the production of what in:

(a) male
(b) female

A

LH:

(a) male - CAUSES TESTES TO SECRETE TESTOSTERONE
(b) female - CAUSES OVULATION AND PROGESTERONE PRODUCTION BY CORPUS LUTEUM

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4
Q

GnRH is released in a _________ manner

A

GnRH is released in a PULSATILE manner

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5
Q

high frequency GnRH pulses cause __ pulses whereas low frequency pulses cause ___ release

A

high frequency GnRH pulses cause LH pulses whereas low frequency pulses cause FSH release

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6
Q

when is GnRH pulsatility at its highest in males?

A

at night and so results in peak of testosterone in morning for men = erections

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7
Q

GnRH pulsatility is regulated by oestrogen and progesterone however GnRH producing _______ do not contain a receptor for these hormones

A

GnRH pulsatility is regulated by oestrogen and progesterone however GnRH producing NEURONS do not contain a receptor for these hormones - KISSPEPTIN

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8
Q

days 1-14:
day 14:
days 14-28:

A

days 1-14: follicular phase
day 14: ovulation
days 14-28: luteal phase

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9
Q

what happens in the follicular phase?

A

follicular growth

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10
Q

what stimulates follicular growth?

A

FSH

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11
Q

increase in oestrogen in follicular phase cause a temporary decrease in what?

A

FSH

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12
Q

once oestrogen levels hit certain concentration, positivity feedback results in an increase in what 2 things?

A

FSH and LH

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13
Q

LH leads to __________ and formation of ______ ______ and ____________ production and secretion

A

LH leads to OVULATION and formation of CORPUS LUTEUM and TESTOSTERONE production and secretion

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14
Q

increasing progesterone decreases the secretion of what?

A

LH

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15
Q

growth of a follicle increases the number of what?

A

follicular cells - NOT OOCYTES!

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16
Q

endometrium thickens under the influence of __________ and a becomes a secretory tissue under the influence of ____________

A

endometrium thickens under the influence of OESTROGEN and a becomes a secretory tissue under the influence of PROGESTERONE

17
Q

LH surge precedes ovulation by how many hours?

A

34-36 hours

18
Q

with increasing LH levels, ____________ levels also increase

A

with increasing LH levels, PROGESTERONE levels also increase

19
Q

corpus luteum formation is due to what?

A

LH

20
Q

what increases thickness of vaginal wall?

A

oestrogen

21
Q

what reduces vaginal pH?

A

oestrogen

22
Q

what decreases vervical mucous viscosity to facilitate sperm penetration?

A

oestrogen

23
Q

what maintains the endometrium thickness?

A

progesterone

24
Q

what is responsible for thick cervical mucous?

A

progesterone

25
Q

what relaxes the myometrium?

A

progesterone

26
Q

the entire spermatogenic process takes __ days

A

the entire spermatogenic process takes 70 days

27
Q 
GnRH
LH
FSH
Oestrogen
Progesterone
Testosterone

what causes follicular growth?

A

FSH

28
Q 
GnRH
LH
FSH
Oestrogen
Progesterone
Testosterone

what influences corpus luteum growth?

A

LH

29
Q 
GnRH
LH
FSH
Oestrogen
Progesterone
Testosterone

what regulates LH surge/

A

oestrogen

30
Q 
GnRH
LH
FSH
Oestrogen
Progesterone
Testosterone

what is known to ‘maintain preganacy’

A

progesterone

Endocrinology (31 decks)

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