The Menstrual Cycle

Question 1

Menstrual cycle

Answer 1

Involving changes in the uterus and ovaries controlled by a number of hormones
Each cycle takes 28 days

Question 2

The start of the cycle (menstruation)

Answer 2

• the lining of the uterus breaks down due to a drop in the level of progesterone
• the cells and blood making up the lining are shed via the vagina

Question 3

Role of the oestrogen

Answer 3

• comes from the ovaries
• the uterus lining then starts to build up again
• developing a mass of blood vessels so it is ready to receive a fertilised ovuum

Question 4

Ovulation

Answer 4

Wall of ovary ruptures and an ovum is released

Question 5

Follicle simulating hormone (FSH)

Answer 5

Causes a follicle in one of the ovaries to mature into an ovum

Question 6

Half away through the cycle

Answer 6

The level of retro gem drops and there is a secretion of the hormone LH from the pituitary gland, triggering ovulation

Question 7

Remains of the follicle after ovulation

Answer 7

Start to secrete progesterone

Question 8

Role of progesterone

Answer 8

Maintains the uterus lining

Question 9

End of the cycle

Answer 9

The remains of the follicle break down resulting in a drop in secretion of progesterone
- the lining of the uterus breaks down again