A scientist measures the concentration of hormone X in a woman during one menstrual cycle. The results are shown in the table.
| Day of cycle | 1 | 7 | 13 | 14 | 15 | 21 |
|---|---|---|---|---|---|---|
| Concentration of hormone X in IU/dm³ | 2 | 3 | 4 | 28 | 5 | 3 |
Name hormone X and state the gland that releases it. Justify your answer using evidence from the table.
The gland identified in part (a) was damaged before the woman's next menstrual cycle. Explain how this could affect ovulation.
85 exam-style questions on AQA GCSE Biology 5.3 Hormonal coordination in humans, covering 5.3.1 Human endocrine system, 5.3.2 Control of blood glucose concentration, 5.3.3 Maintaining water and nitrogen balance in the body, 5.3.4 Hormones in human reproduction, 5.3.5 Contraception, 5.3.6 The use of hormones to treat infertility (HT only), and 5.3.7 Negative feedback (HT only). Each one has a worked solution and a mark scheme showing where the marks go.