Puberty and the menstrual cycle Flashcards
What does your body start releasing at puberty
Sex hormones
What do sex hormones trigger
Secondary sexual characteristics eg hair, breast etc and cause eggs to mature in women
What is the main reproductive hormone in men
Testosterone which is produced in the testes and stimulates sperm production
What is the main reproductive hormone in women
Oestrogen which is produce in the ovaries which brings about physical changes but also plays a role in the menstrual cycle
How many stages does the menstrual cycle have
4
What is stage 1 of the menstrual cycle
-day 1-…
-… starts
-the uterus … breaks … for around … days
-day 1-4
-menstruation starts
-the uterus lining breaks down for around 4 days
What is stage 2 of the menstrual cycle
-day …-…
-the … lining … up again
-into a … thick layer full of blood … in … for a … egg
-… levels …
-day 4-14
-the uterus lining builds up again
-into a spongy thick layer full of blood vessels in preparation for a fertilised egg
-oestrogen level increase
What is stage 3 of the menstrual cycle
-day …
-an … develops and is … from the …
-o…
-… increases which … the … of an egg
-day 14
-an egg develops and is released from the ovary
-ovulation
-LH increases which stimulates the release of an egg
What is stage 4 in the menstrual cycle
-day …-28
-the wall is …
-if the is no … egg by day … then the … lining starts to … down
-the cycle …
-… increases which … the … of the uterus
-day 14-28
-the wall is maintained
-if the is no fertilised egg by day 28 then the spongy lining starts to break down
-the cycle repeats
-progesterone increases which maintains the lining of the uterus
What 4 hormones is the menstrual cycle controlled by
-…
-…
-o…
-p…
-FSH
-LH
-Oestrogen
-Progesterone
What is FSH
-…-stimulating …
-produced in the … gland
-causes and .. to … in an … in a structure called a …
-… ovaries to produce …
-follicle-stimulating hormone
-produced in the pituitary gland
-causes and egg to mature in an ovary in a structure called a follicle
-stimulates ovaries to produce oestrogen
What is LH
-… hormone
-produced in the … gland
-… the … of an egg (…)
-Luteinising hormone
-produced in the pituitary gland
-stimulates the release of an egg (ovulation)
What is oestrogen
-produced in the …
-causes the … of the uterus to …
-… the release of … (causes the … of an …)
-… release of … (causes egg to …)
-produced in the ovaries
-causes the lining of the uterus to grow
-stimulates the release of LH (causes the release of an egg)
-inhibits release of FSH (causes egg to mature)
What is progesterone
-produced in the … by the remains of the … offer …
-maintains the … of the … during the … half of the …
-when … levels fall the lining … down
-… the release of … and …
-produced in the ovaries by the remains of the follicle offer ovulation
-maintains the lining of the uterus during the 2nd half of the cycle
-when progesterone levels fall the lining breaks down
-inhibits the release of LH and FSH