Hormones and reproduction (P2C4) Flashcards
What the purpose of testosterone?
- Testosterone is the male sex hormone that stimulates sperm production.
What is the purpose of FSH? (2 points)
- FSH causes eggs to mature in the ovaries in the first part of the cycle.
- FSH stimulates the ovaries to produce oestrogen.
What is the purpose of oestrogen? (3 points)
- Inhibits FSH release.
- Stimulates LH release.
- Grows lining of uterus.
What is the purpose of LH? (1 point)
- LH stimulates the release of the egg from the ovary.
What is the purpose of progesterone? (3 points)
- Progesterone maintains the lining of the uterus during the second half of the cycle.
- Progesterone inhibits LH release.
- Progesterone inhibits FSH release.
Where is FSH secreted?
FSH is secreted from the pituitary gland.
Where is oestrogen secreted?
Oestrogen is secreted from the ovaries.
Where is LH secreted?
LH is secreted from the pituitary gland.
Where is progesterone secreted?
Progesterone is secreted from an empty follicle in the ovaries.
How do contraceptive pills work?
Contraceptive pills contain large amounts of oestrogen and progesterone, which inhibit FSH production so no eggs are released.
How do contraceptive injections work?
Contraceptive injections involve injecting slow release progesterone to prevent egg release for multiple years.
How do intrauterine devices work?
Intrauterine devices prevent embryos being implanted in the uterus.
How does IVF (in vitro fertilisation) work?
IVF involves:
- Injection of LH and FSH.
- Collection of eggs.
- Fertilisation of the eggs with the father’s sperm in a laboratory.
- Insertion of the fertilised eggs into the uterus.
What are the potential disadvantages of IVF? (3 points)
- IVF is emotionally and physically stressful.
- IVF has somewhat low success rates.
- IVF can lead to multiple births, which can be a risk.
