Scientists prepare four identical cultures of pituitary gland cells. Each culture receives a different treatment.
| Treatment | Hormone condition |
|---|---|
| A | no ovarian hormone added |
| B | oestrogen increased but kept below a high concentration |
| C | oestrogen increased until it reached a high concentration |
| D | progesterone added at a high concentration |
In one culture, FSH release falls and is followed by a sharp increase in LH release.
Which treatment was used for this culture?
Treatment B: oestrogen increased but remained below a high concentration.
Treatment D: progesterone was added at a high concentration.
Treatment A: no ovarian hormone was added.
Treatment C: oestrogen increased until it reached a high concentration.
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.