lesson 11 menstrual cycle Flashcards
during puberty, reproductive hormones cause what to develop
secondary sexual characteristics
what’s an example of a secondary sexual characteristic
pubic hair
in men, the testes produce what hormone
testosterone
testosterone does what
it stimulates the testes to produce sperm
in women, the ovaries produce which hormone
oestrogen
once puberty begins, eggs in the ovaries do what
they start to mature
every 28 days what is release
an egg- called ovulation
every 28 days what takes place
ovulation
(ovaries releases an egg)
in preparation for ovulation to take place, what occurs to the uterus lining
it becomes thick and spongy
as the egg makes it way down the uterus, if sperm is present, what can occur
the egg can be fertilised
if your egg can be fertilised as sperm is present as your egg makes it down the uterus, what can occur
your fertilised egg can implant into the uterus wall and develop into a baby
if your egg does not get fertilised, then what occurs
both the egg and uterus lining are released
-called a period
FSH is known as what
follicle-stimulating hormone
FSH causes what
an egg to mature in the ovary
LH is known as what
luteinising hormone
LH causes the egg to what
be released, also known as ovulation
oestrogen is produced by the what
ovary
oestrogen and progesterone are involved in what
maintaining the uterus lining
(in case the egg is fertilised and implants)
FSH is produced by what
the pituitary gland
FSH travels where
in the blood to the ovaries
what does FSH cause
an egg to mature
at the same time, FSH triggers the ovaries to make what
oestrogen
oestrogen causes the lining of the uterus to become what
thick
oestrogen also stops the pituitary gland from releasing anymore what
FSH
instead of FSH the pituitary gland now releases what
LH
LH triggers what
ovulation
(mature egg is released)
once the ovary has released its egg, the ovary then produces which hormone
progesterone
progesterone stops the pituitary gland from releasing what
FSH and LH
why does progesterone keep the lining of the uterus thick
in case a fertilised egg implants
if fertilisation does not take place, what happens to the level of progesterone
it falls
the uterus lining and the egg are released, which causes what
a period
the level of FSH rising causes what
the ovaries to release oestrogen
as the level of oestrogen increases this inhibits the production of FSH, so what happens to the level of FSH
it falls
oestrogen triggers the release of LH, so the LH level rises to a peak when
at day 14
LH trigger ovulation, and once this occurs, what occurs
the ovary now releases progesterone
-meaning the progesterone level rises
if fertilisation does not occur, then progesterone levels do what
they fall
if the progesterone levels fall what occurs
the woman is then on her period
