hormonal control of reproduction

Question 1

name the hormones involved in males

Answer 1

follicle stimulation hormone (FSH) and interstitial cell stimulating hormone (ICHH)

Question 2

name the hormones involved in females

Answer 2

follicle stimulation hormone (FSH) and luteinising hormone (LH)

Question 3

state the effect each male hormone has on the body

Answer 3

FSH promotes sperm production. ICSH stimulates the interstitial cells to produce testosterone

Question 4

describe negative feedback in males

Answer 4

when the testosterone levels increase above a certain level it inhibits the secretion of FSH and ICSH from the pituitary gland

Question 5

what is the length of one menstrual cycle

Answer 5

28 days

Question 6

what changes occur during the follicular phase

Answer 6

FSH stimulates a follicle to mature and secrete oestrogen. The oestrogen stimulates the repair of the endometrium and makes the cervical mucus thinner.

Question 7

what changes occur during the luteal phase

Answer 7

the follice develops into a corpus luteum and starts to secrete progesterone. Further development and vascularisation of the endometrium

Question 8

describe the negative feedback effect of the ovarian hormones on the pituitary gland

Answer 8

high progesterone levels inhibit FSH and

Question 9

describe the negative feedback effect of the ovarian hormones on the pituitary gland

Answer 9

high progesterone levels inhibit FSH and LH which stop the putiatory gland from secreting more

Question 10

describe the changes that take place if fertilisations does not occur

Answer 10

the corpus luteum does not degenerate and progesterone levels remain high