Hormonal Control of Reproduction Flashcards
What is the role of the pituitary gland?
It is stimulated to release FSH, LH or ICSH by a releaser hormone produced in the hypothalamus. This triggers the onset of puberty.
What promotes sperm production?
Follicle stimulating hormone (FSH).
What stimulates the production of testosterone?
Interstitial Cell Stimulating Hormone (ICSH).
What is the function of testosterone?
To stimulate sperm production and activate the prostate gland and seminal vesicles.
How is the level of testosterone controlled?
By negative feedback control by FSH and ICSH.
What does FSH stimulate?
The development of a follicle and the production of oestrogen by the follicle in the follicular phase.
What stimulates the proliferation of the endometrium, preparing it for implantation?
Oestrogen.
What causes the thinning of the cervical mucus making it more easily penetrated by sperm?
The release of oestrogen.
What stimulates a surge in the secretion of LH?
Peak levels of oestrogen.
What triggers ovulation?
The surge in LH.
What is ovulation?
The release of an egg from a follicle in the ovary.
When does ovulation occur?
Around the midpoint of the menstrual cycle.
What occurs in the luteal phase?
The follicle develops into a corpus luteum which secretes progesterone.
What does progesterone promote?
The further development and vascularisation of the endometrium preparing it for implantation if fertilisation occurs.
What effect does the negative feedback of the ovarian hormones on the pituitary gland and the secretion of FSH and LH have?
It prevents further follicles from developing.
