Coordination & Control – the Endocrine System (OCR GCSE Combined Science A (Gateway): Biology)

The graph shows the fluctuations in four hormones involved in the menstrual cycle.

Which line represents the hormone responsible for ovulation?

The graph shows usage of different forms of contraception in four groups of 100 women.

Each group used a different form of contraception.

Which is the least effective method of contraception?

Which hormone is involved in controlling the menstrual cycle?

When a woman reaches the age of about 50, eggs are released less often from her ovaries.
To try and correct this, her body increases the production of one hormone.

Which hormone is this?