bio 34.2
viral infections
stds, hepatitis b, genital herpes, human paplimoavs, hiv -attacks body cells. causes infertility and death -no cure
female- b4 birth male- @ puberty
at what stage of life does egg or sperm production begin
...
check study guide
bacterial infection
chlamydia, syphilis, gonorrhea -attack and destroy repro organs and causes infertility -antibotics
monthly changes in female repro sys-maturing and releasing the egg and preparing the uterus to recieve a zygote
define menstrual cycle
utuerus lining, endometrium flows out of the body with some blood and all hormones are low
flow phase details
increase in FSH and LSH and stimulates maturing and release of the egg, ovulation. increase in estrogen causes the lining of the uterus to thicken.
follicular phase details
in flow phase endometrium detaches from the uterus and is expelled from the body in follicular and luteal endometrium thickens.
how does the endometrium change during the three phases of the menstrual cycle
nuclei of the sperm and egg unite
how is a zygote produced
vas deferins tube is small or obstructed organs damaged from injurey or disease low sperm count
list 3 reasons a person might become infertile
corpus luteum forms. release of estrogen and progesterone stops production of FSH and LSh. increase the number of blood vessels in the uterus.
luteal phase details
1 sperm penetrates membrane and all. then these chem reacs take place inside egg- egg begins to change and membrane becomes impenetrable
out of millions of sperm usually only one can fertilize an egg. explain y
must b passed thru person 2 person contact
what characteristics must a disease have for it to be sexually transmitted disease.
23 chromos from sperm and 23 from egg unite with it and produce zygote with 46.
what happens genetically to produce a zygote
fe-FSh and LH and estrogen male- fsh lh annd testostone
what hormones stimulate the cycle of egg or sperm production
develop and release an egg and prepare the uterus to receive it
what r the funcs of the menstrual cycle
for female and male meiosis 1 and 2
what type of cell division produces mature eggs and sperm