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female sex hormones Flashcards

(16 cards)

1
Q

GnRH is secreted by what part of the brain and stimulates release of what from anterior pituitary?

A
  • FSH
  • LH
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2
Q

FSH initiates what?

A
  • follicular growth
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3
Q

LH stimulates what?

A
  • further development of follicles
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4
Q

FSH and LH stimulate ovarian follicles to secrete what?

A
  • oestrogen
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5
Q

progesterone is mainly secreted by what?

A
  • corpus luteum
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6
Q

progesterone and oestrogen prepare and maintain the endometrium ready for?

A
  • implantation
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7
Q

a normal cycle lasts for how long?

A
  • 24-38 days
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8
Q

bleeding should last how many days or less each cycle?

A
  • 8 days or less
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9
Q

what does ovarian cycle consist of?

A
  • follicular phase, ovulation, luteal phase
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10
Q

what does uterine cycle consist of?

A
  • menstrual phase, proliferative phase, secretory phase
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11
Q

menstrual phase roughly lasts how long?

A
  • roughly first 5 days of cycle
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12
Q

in ovaries under influence of FSH, primary follicles develop into

A
  • secondary follicles
    -> this may take several cycles
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13
Q

in uterus, fall in oestrogen and progesterone stimulates release of what hormone?

A
  • prostaglandins - causing uterine spiral arterioles to constrict
  • cells supplied by arterioles die and entire stratum functionalis of endometrium sloughs off leaving thin stratum basalis
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14
Q

what is the layer of endometrium that sloughs off during menstrual phase?

A
  • stratum functionalis
  • leaving behind stratum basalis
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15
Q

roughly how much blood is lost during menstrual phase?

A
  • 5-80mls
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16
Q

what is pre