Menstrual cycle

Question 1

What are the four hormones involved in the menstrual cycle?

Answer 1

Oestrogen
FSH (follicle stimulating hormone)
LH (lutenising hormone)
Progesterone

Question 2

Describe the role of FSH

Answer 2

Causes an ovum to mature in the ovary

Stimulates ovaries to produce oestrogen

Question 3

Where is FSH released?

Answer 3

Pituitary gland

Question 4

Describe the role of Oestrogern

Answer 4

Causes the uterine lining to thicken in the first half of the menstrual cycle
In the pituitary gland, high oestrogen concentration switches off release of FSH and switches on release of LH

Question 5

Where is Oestrogen released?

Answer 5

Ovaries

Question 6

Describe the role of LH

Answer 6

Stimulates ovulation

Question 7

Where is LH released?

Answer 7

Pituitary gland

Question 8

Describe the role of Progesterone

Answer 8

Maintains uterine lining if fertilised ovum implants

High concentrations of progesterone in pregnancy to stop the menstrual cycle.

Question 9

Where is Progesterone released?

Answer 9

Ovaries