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biology paper two > Homeostasis - menstrual cycle > Flashcards

Homeostasis - menstrual cycle Flashcards

1
Q

what happens during puberty?

A

reproductive hormones cause secondary sexual characteristics to develop e.g pubic hair

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2
Q

what hormones are produced in men? job? where?

A

testes produce testosterone which stimulates the production of sperm

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3
Q

when hormone is produced in women?

A

oestrogen

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4
Q

what happens during puberty? (women/girls)

A

eggs in ovaries mature

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5
Q

what happens every 28 days?

A

release of an egg (ovulation)

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6
Q

what happens in preparation for ovulation?

A

uterus lining becomes thick and spongy

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7
Q

Egg makes its way to the ______

A

uterus

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8
Q

what happens if sperm is present in the uterus?

A

egg will be fertilised which will implant into uterus wall and develop into a baby

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9
Q

what happens if no sperm is present in uterus?

A

egg and uterus lining are released. women gets her period

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10
Q

what are the 4 hormones during menstrual cycle

A

follicle stimulating hormone , leteinising, oestrogen and progesterone

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11
Q

what is the function if follicle stimulating hormone?

A

causes egg to mature in ovary

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12
Q

what is the function of luteinising hormone?

A

causes the egg that has matured in ovary to be released (ovulation)

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13
Q

what is the function if oestrogen and progesterone?

A

involved in maintains uterus lining. in case egg is fertilised and implants

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14
Q

what is oestrogen produced?

A

ovaries

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15
Q

what is the 1st stage in cycle to do with hormones?

A

FSH released by pituitary gland which travels in blood to ovaries where it causes an egg to mature

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16
Q

what happens while FSH is causing an egg to mature?

A

At the same time, FSH causes ovaries to produce oestrogen

17
Q

what is the job of oestrogen in cycle?

A
  • cause lining on uterus to become thick
  • stops pituitary gland releasing more FSH
18
Q

what is the 2nd stage of cycle?

A

pituitary gland releases luteinising hormone which triggers ovulation

19
Q

what is the 3rd stage?

A

when ovary releases an egg, it now produces progesterone

20
Q

job of progesterone in cycle?

A
  • keeps lining of uterus thick
  • stops pituitary gland producing more FSH and LH so no more eggs will mature or release
21
Q

what happens to levels of progesterone after ovulation? why can they lower?

A

they will rise

they will lower if no fertilisation

22
Q

what day does luteinising hormone levels peak?

biology paper two (61 decks)

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