Unit Two - Key Area 2 Flashcards
What are the hormones that are produced in the pituitary gland?
FSH, LH, ICSH
What triggers the onset of puberty?
a releaser hormone produced in the hypothalamus
What does FSH do in males?
promotes sperm production
What does ICSH do in males?
stimulates the production of testosterone
Describe the role of negative feedback to control testosterone production
The pituitary gland produces FSH and ICSH, stimulates the production of testosterone in the testes, testosterone concentration increases in the blood inhibiting the production of FSH and ICSH, decrease in FSH and ICSH stops the production of testosterone, testosterone concentration drops
How long does the menstrual cycle normally take?
28 days
What are the three phases of the menstrual cycle?
the follicular phase, the luteal phase and the menstrual phase
What is the role of FSH in the menstrual cycle?
stimulates the development of the follicle and production of oestrogen by the follicle in the follicular phase.
What does oestrogen do?
stimulates the proliferation of the endometrium (lining of the uterus) preparing it for implantation and affects the consistency of cervical mucus. The mucus becomes thinner and waterier in consistency making it more easily penetrated by sperm.
What happens if fertilisation takes place during the menstrual cycle?
progesterone levels would remain high and the level of FSH would remain low at the end of this cycle
What stimulates the surge in the secretion of LH?
peak levels of oestrogen
What triggers ovulation?
the surge in LH
What is ovulation?
the release of ovum from a follicle in the ovary
When does ovulation usually occur?
mid point of the menstrual cycle
What happens during the luteal phase in terms of the follicle?
the follicle develops into a corpus luteum
