A computer model was used to simulate the first half of two menstrual cycles. The two simulations differed in only one setting for the simulated pituitary gland.
The table shows the results.
| simulation | mean FSH concentration from day 1 to day 10 / IU dm⁻³ | diameter of largest follicle on day 12 / mm | oestrogen concentration on day 12 / pmol dm⁻³ |
|---|---|---|---|
| A | 3.0 | 7 | 160 |
| B | 8.0 | 18 | 620 |
Explain why the model predicts that ovulation in the next few days is less likely in simulation A than in simulation B. Use data from the table in your answer.
90 exam-style questions on Edexcel GCSE Biology 7.2 Reproductive hormones, covering 7.2.1 Stages of the menstrual cycle, 7.2.2 Hormonal control of the menstrual cycle, 7.2.3 Hormonal contraception, 7.2.4 Evaluating contraception methods, and 7.2.5 Hormones in Assisted Reproductive Technology. Each one has a worked solution and a mark scheme showing where the marks go.