20- reproduction in humans, pregnancy & menstruation & Flashcards
(10 cards)
1
Q
what are sexual and asexual reproduction
A
- asexual: reproduction resulting in genetically identical offspring from 1 parent
- sexual: fusion of gametes from 2 parents to form zygote that is genetically different
2
Q
how does an embryo develop during pregnancy
A
- embryo implants in the wall of the uterus
- placenta develops
- umbilical cord develops
- embryo surrounded by amniotic sac
3
Q
functions of the placenta
A
- allows dissolved & O2 nutrients from the mother to the fetus
- allows waste from the fetus to the mother
- prevents toxins from passing to the fetus
4
Q
adv of breast milk
A
- right nutrients in the right amounts
- antibodies pass from the mother to the baby
- no risk of infection from the bottle
- bond between the mother and the baby
- free
- no preparation.
5
Q
dis of breast feeding
A
- painful and difficult
- only the mom can feed the baby
- pathogens can pass from the mom to the baby
6
Q
what does testosterone do in men?
A
- hair growth
- muscles to develop
- penis and testis to develop
- sperm
- deepening of the voice
7
Q
what does oestrogen do in women?
A
- extra hair
- hips to widen
- development of chest area
- eggs
8
Q
stages of menstruation and hormones
A
- FSH: Causes a follicle to mature in one of the ovaries & Stimulates the ovaries to produce oestrogen.
- oestrogen: Causes the lining of the uterus to grow & Stimulates the release of LH
- LH: Stimulates the release of the egg from the follicle at day 14 & Stimulates the remains of the follicle to develop into a corpus luteum, which is temporary storage of progesterone
- progesterone: Maintains the lining of the uterus
9
Q
what is Artificial Insemination
A
directly injecting sperm into the cervix
10
Q
what is In Vitro Fertilisation
A
In vitro fertilisation (IVF) involves collecting eggs from the woman’s ovaries and fertilising them in a lab using the man’s sperm.
