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Unit 2 > Hormones > Flashcards

Hormones Flashcards

1
Q

Male! FSH

A

Promotes sperm production

Like testosterone

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2
Q

Male ICSH

A

Stimulates the release of testosterone from interstitial cells

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3
Q

Interstitial cells

A

Produce testosterone

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4
Q

Hormones

A

Chemical messengers produced by endocrine glands

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5
Q

Hypothalamus

A

Secretes releaser hormone that targets pituitary gland

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6
Q

Pituitary gland

A

Releases FSH and ICSH

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7
Q

Testosterone (2)

A

Stimulates sperm production in seminiferous tubules add activates prostate gland & seminal vesicles to produce their secretions

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8
Q

What happens when testosterone levels are high in blood?

A

It inhibits secretion of FSH and ICSH from pituitary gland.
This then decreases testosterone leaves by interstitial cells.
When levels drop it no longer Inhibits FSH and ICSH

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9
Q

females FSH

A

Initiates the release of gametes and production of oestrogen and maturation of a follicle

Site of production -Pituitary gland

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10
Q

Female LH

A

Stimulates the corpus luteum to real ease progesterone

Site of production - pituitary gland

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11
Q

How long does menstrual cycle last

A

28days

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12
Q

Follicular phase (3)

A
  1. Stimulates follicle development and oestrogen production
  2. Oestrogen stimulates endometrium repair preparing it for implantation and effects mucus consistency so easily penetrated by sperm
  3. peak oestrogen levels act on pituitary glands and stimulate surge in LH which triggers ovulation
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13
Q

Luteal phase

A
  1. Remaining cells of follicle develop into corpus luteum and secrete progesterone
  2. progesterone promotes vascularisation of endometrium, preparing it to receive blastocyst if fertilisation occurs
  3. Progesterone thickening of endometrium
  4. Blastocyst develops to form a zygote - thin walled hallow spher
  5. Zygote implants in endometrium of uterus around 8-13 days after fertilisation
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14
Q

What happens when there is high progesterone levels?

A

FSH and LH is inhibited

Inhibition of FSH prevents further follicle developments

Inhibition of LH degenerated corpus luteum which causes drop in progesterone

Drop in progesterone causes menstruation and cycle starts again

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15
Q

Oestrogen

A

Site of production - ovaries

Repair endometrium

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16
Q

Progesterone

A

Site of production - ovaries

Promotes vascularisation of endometrium

17
Q

No fertilisation

A
  • corpus luteum degenerates
  • oestrogen&progesterone levels decrease
  • results in menstruation , endometrium inner layer sheds
18
Q

Fertilisation and pregnancy

A
  • Corpus luteum continues to produce progesterone
  • placenta takes over progesterone production few weeks in
  • inhibitory effects on progesterone drops fsh and LH levels

Unit 2 (12 decks)

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