Hormonal Control Of Reproduction Flashcards
1
Q
What does the pituitary gland release in females?
A
- follicle stimulating hormone (FSH)
- lutenising hormone (LH)
2
Q
What does the pituitary gland release in males?
A
- follicle stimulating hormone (FSH)
- interstitial cell stimulating hormone (ICSH)
3
Q
What triggers puberty?
A
- the pituitary gland is stimulating by a releaser hormone that is produced in the hypothalamus
4
Q
What does FSH do in males?
A
- promotes sperm production
5
Q
What does ICSH do in males?
A
- stimulates testosterone production
6
Q
What does testosterone do?
A
- stimulates sperm production
- activates the prostate gland and seminal vesicles
7
Q
What creates negative feedback of testosterone?
A
- FSH and ICSH
8
Q
How long does the menstrual cycle last for?
A
- 28 days
9
Q
What is the first day of me situation regarded as?
A
- day one of the cycle
10
Q
Describe the follicle phase.
A
- FSH stimulates the development of a follicle in the ovary
- the follicle produces oestrogen
- oestrogen stimulates proliferation of the endometrium and effects the consistency of cervical mucus, making it more easily penetrated by sperm
- high levels of oestrogen cause a surge in LH
This triggers ovulation
11
Q
Describe the luteal phase.
A
- the follicle develops into the corpus lutem after ovulation
- the corpus lutem secretes progesterone
- the progesterone promotes further development and vascularisation of the endometrium preparing
- high levels of ovarian hormones have negative feed back control on action of pituitary inhibiting FSH and LH production, so no new follicles are produced
- lack of LH causes corpus lutem to degenerate causing a drop in progesterone
- leading to menstruation as endometrium can’t be maintained
12
Q
What happens if fertilisation does occur?
A
- the corpus lutem doesn’t degenerate and progesterone levels remain high
