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Figure 17 shows the concentration of the hormones oestrogen and progesterone in the blood of women of different ages - Edexcel - GCSE Biology - Question 9 - 2018 - Paper 1
Question 9
Figure 17 shows the concentration of the hormones oestrogen and progesterone in the blood of women of different ages. (i) Use information from Figure 17 to explain ... show full transcript
Worked Solution & Example Answer:Figure 17 shows the concentration of the hormones oestrogen and progesterone in the blood of women of different ages - Edexcel - GCSE Biology - Question 9 - 2018 - Paper 1
Step 1
Use information from Figure 17 to explain why women over the age of 50 are less likely to ovulate.
Answer
Women over the age of 50 have low levels of oestrogen, which is crucial for the release of luteinizing hormone (LH). Without a sufficient surge of LH, ovulation fails to occur as oestrogen levels do not reach the threshold needed for this process.
Step 2
Use information from Figure 17 to explain why women are less likely to menstruate after the age of 60.
Answer
After the age of 60, low levels of oestrogen lead to the uterine lining not building up properly. This lack of buildup results in insufficient lining to be shed during menstruation, leading to a cessation of menstrual cycles.