HOMEOSTASIS #2 Flashcards
What is the main female reproductive hormone?
oestrogen
where is oestrogen produced
the ovaries
the menstrual cycle- what happens
every 28 days a mature egg is released from its ovary, if the egg is not fertilised, the lining of the uterus along with the egg is shed around 14 days later.
what is it called when a mature egg is released from the ovary
ovulation
what are the hormones involved in controlling the menstrual cycle and what do they do
FSH- causes the egg in the ovary to mature
LH- stimulates the release of the egg at ovulation
oestrogen and progesterone- stimulates the build up and maintenance of the uterus lining
what happens each month in the ovary
eggs begin to mature and the uterus produces a thickened lining ready for pregnancy
what is the main male reproductive hormone and where is it produced
testosterone and in the testes
what 4 hormones interactions coordinate the events of the menstrual cycle
FSH, LH OESTROGEN AND PROGESTERONE
FSH- detailed
is secreted by the pituitary gland
makes eggs mature in their follicles in the ovaries
stimulates the ovaries to produce hormones including oestrogen
oestrogen- detailed
is made and secreted by the ovaries in response to FSH
stimulates the lining of the uterus to grow again after menstruation in preparation for pregnancy
inhibits the production of more FSH and stimulates the release of LH when oestrogen levels are high
LH-detailed
is secreted by the pituitary gland
stimulates the release of a mature egg from the ovary
levels fall again once ovulation has taken place
progesterone- detailed
is secreted by the empty egg follicle in the ovary after ovulation
is one of the hormones that helps to maintain a pregnancy if the egg is fertilised
inhibits both FSH and LH
maintains the lining of the uterus in the second half of the cycle.
name the two hormones produced by the pituitary gland that are involved in controlling the menstrual cycle
FSH AND LH
which hormone inhibits FSH
oestrogen
what two hormones are present in contraceptive pills
oestrogen and progesterone
what do contraceptive pills do
they inhibit FSH production so no eggs are released
stop the uterus lining developing preventing implantation
make the cervix thick to prevent sperm getting through