U2: 10- Hormonal Control Of Reproduction Flashcards
Name the glands that hormones are produced from.
Endocrine glands
Which hormone is produced by the hypothalamus around puberty time which kick-starts the production of sperm?
Releaser hormone
Where does releaser hormone travel to from the hypothalamus?
Pituitary gland
Name the two hormones produced by the pituitary gland in males.
FSH and ICSH
When FSH is released from the pituitary gland in males, where does it travel to?
Seminiferous tubules in the testes
What do the seminiferous tubules make after being stimulated by FSH?
Sperm
What does ICSH released from the pituitary gland do?
Stimulates the interstitial cells to produce testosterone
What two jobs does testosterone do?
- stimulates the seminiferous tubules to make sperm
* activates the accessory glands
When there is a build up of testosterone in males what happens?
Testosterone inhibits the production of FSH and ICSH from the pituitary gland
When testosterone levels fall, the FSH and ICSH production is resumed following a period of being inhibited. What name is given to this type of regulation?
Negative feedback control
Name the hormone released from the hypothalamus in females during puberty that kick starts the menstrual cycle.
Releaser hormone
Name the two hormones that are released from the pituitary gland in females.
FSH and LH
Name the hormone released by the pituitary gland that causes the development of an egg inside the follicle.
FSH
What ovarian hormone is released by the ovary in response to an egg developing in the follicle?
Oestrogen
What effect does oestrogen have on the endometrium?
Causes proliferation
As oestrogen levels build up, it stimulates the pituitary gland to release which hormone?
LH
What two events does LH being released from the pituitary gland cause?
- ovulation
* formation of corpus luteum from the follicle
Name the hormone released by the corpus luteum as well as oestrogen.
Progesterone
Which two hormones are classed as ovarian hormones?
Oestrogen and progesterone
Progesterone travels to the endometrium and causes what to happen?
Vascularisation of the endometrium
As progesterone builds up an inhibitory message is sent back to the pituitary gland to tell it to inhibit the production of which two hormones?
FSH and LH
If FSH and LH levels drop what other two ovarian hormone levels will drop?
Oestrogen and progesterone
What structure will break down if oestrogen and progesterone are not there to maintain it?
The endometrium- resulting in a period
If fertilisation does occur, which hormone will be secreted by the embryo that will maintain the corpus luteum and allow it to continue to secrete oestrogen and progesterone?
HCG (human chorionic gonadotropin)
Name the two phases of the menstrual cycle.
Follicular phase and luteal phase
What name is given to the process of the release of an egg from the follicle?
Ovulation
What events are described in the follicular phase of the menstrual cycle?
All the events up to ovulation
What events are described in the luteal phase of the menstrual cycle?
All the events after ovulation up to the onset of a period
