Edexcel IGCSEBiologyGeneral Applications7 Marks
The menstrual cycle in human females is regulated by hormones.
- (a)Name two hormones involved in the menstrual cycle.[2]
- (b)Describe the role of oestrogen in the menstrual cycle.[3]
- (c)Explain how oral contraceptive pills prevent pregnancy.[2]
Mark scheme
Marking points from the official mark scheme. The mark or mark type is shown in brackets.
- 16(a) B1: oestrogen / estrogen (1)
- B1: progesterone / LH / FSH (1)
- 16(b) M1: repairs / rebuilds uterus lining (after menstruation) (1)
- M1: stimulates LH production / inhibits FSH (1)
- A1: triggers ovulation / secondary sexual characteristics (1)
- 16(c) M1: contain (synthetic) oestrogen / progesterone (1)
- A1: inhibit FSH / LH production / prevent ovulation / thicken cervical mucus / make uterus lining unsuitable (1)
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