Menstrual Cycle

Question 0

What are he two hormones that control the menstrual cycle?

Answer 0

Oestrogen

Progesterone

Question 1

What is menstruation?

Answer 1

Breakdown of the uterus lining. It begins on day 1 of the cycle and usually lasts between 4 and 7 days.

Question 2

What happens in the second week of the cycle?

Answer 2

The lining of the uterus is gradually built up

Question 3

What is ovulation?

Answer 3

Ovulation is the release of an egg from an ovary, this usually takes place around day 14.

Question 4

What is most likely to take place on days 14-16 of the cycle?

Answer 4

Fertilisation

Question 5

What happens throughout weeks 3 and 4?

Answer 5

The lining of the uterus continues to build up

Question 6

What happens if fertilisation occurs?

Answer 6

The lining of the uterus is maintained and menstruation does not happen

Question 7

What triggers menstraution?

Answer 7

Falling oestrogen and progesterone

Question 8

What hormone triggers ovulation?

Answer 8

LH

Question 9

What do maturing follicle stimulate?

Answer 9

Oestrogen production

Question 10

What does FSH stimulate?

Answer 10

Growth and maturation of follicles

Question 11

What does increasing progesterone inhibit?

Answer 11

The release of FSH and LH

Question 12

What yellow body releases progesterone?

Answer 12

Corpus luteum

Question 13

What does increasing oestrogen cause?

Answer 13

Thickening of wall

Question 14

High levels of oestrogen stimulate the release of more of what hormone?

Answer 14

LH

Question 15

Explain how the control of the menstrual cycle is a negative feedback mechanism.

Answer 15

Changes caused by the release of one hormone inhibits the secretion of other hormones. For example, progesterone inhibits FSH and LH