Reproduction and Inheritance

Question 1

what is the role of oestrogen in the menstrual cycle

Answer 1

This causes the uterine wall to start thickening and the egg to mature

Question 2

what is the role of progesterone in the menstrual cycle

Answer 2

cause the uterine lining to thicken further; a fall in progesterone levels causes the uterine lining to break down (menstruation)

Question 3

what is the role of LH in the menstrual cycle

Answer 3

causes ovulation to occur and also stimulates the ovary to produce progesterone

Question 4

what is the role of FSH in the menstrual cycle

Answer 4

causes an egg to start maturing in the ovary
It also stimulates the ovaries to start releasing oestrogen

Question 5

what is LH

Answer 5

luteinising hormone

Question 6

what is FSH

Answer 6

follicle-stimulating hormone

Question 7

when is oestrogen released

Answer 7

levels rise from day 1 to peak just before day 14
The peak in oestrogen occurs just before the egg is released

Question 8

when is progesterone released

Answer 8

stays low from day 1 – 14 and starts to rise once ovulation has occurred