The table shows the concentrations of four hormones in the blood of a woman on different days of her 28-day menstrual cycle. Table
| Hormone | Day 2 | Day 7 | Day 13 | Day 21 | Day 27 |
|---|---|---|---|---|---|
| W | 5 | 7 | 45 | 6 | 5 |
| X | 1 | 1 | 2 | 16 | 2 |
| Y | 4 | 10 | 18 | 9 | 3 |
| Z | 9 | 6 | 15 | 3 | 8 |
| All concentrations are in arbitrary units. | |||||
| Which statement correctly identifies hormone W and hormone X? |
W is FSH; X is oestrogen.
W is LH; X is progesterone.
W is oestrogen; X is LH.
W is LH; X is oestrogen.
84 exam-style questions on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.