lesson 12 puberty and the menstrual cycle Flashcards
hormones produce sexual characteristics when
at puberty
at puberty, your body starts to release what
sexual hormones
sexual hormones trigger off what
secondary sexual characteristics
(facial hair, breasts)
sexual hormones also cause eggs to do what for women
mature
in men, the main reproductive hormone is what
testosterone
testosterone is produced by the what
testes
testosterone stimulates what
sperm production
in women the main reproductive hormone is what
oestrogen
oestrogen is produced by what
the ovaries
stage 1/ day 1 of the menstrual cycle, what occurs
menstruation starts, where the lining breaks down for about 4 days
stage 2 from day 4 to 14, what occurs
the uterus lining builds up again, into a thick spongey layer full of blood vessels, ready to receive a fertilised egg
stage 3- at day 14 what occurs
an egg develops and is released from the ovary- called ovulation
stage 4- from day 14 to 28
the wall is then maintained, if no fertilised egg has landed on the uterus wall by day 28,the spongey lining starts to breakdown restarting the whole menstrual cycle
the menstrual cycle is controlled by which 4 hormones
oestrogen
progesterone
FSH
LH
oestrogen is produced where
by the ovaries
the oestrogen causes what
the lining of the uterus to grow
oestrogen stimulates the releasement of what
LH and inhibits a release of FSH
FSH is known as what
follicle-stimulating hormone
FSH is produced where
by the pituitary gland
FSH causes an egg to what
mature in one of the ovaries, in a structure called follicle
LH is known as what
luteinising hormone
LH is produced where
by the pituitary gland
LH stimulates what
the release of an egg at day 14 (ovulation)
progesterone is produced where
in the ovaries by the remains of the follicle after ovulation
