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Figure 8 shows the changes in the levels of the hormones of the menstrual cycle - Edexcel - GCSE Biology Combined Science - Question 5 - 2023 - Paper 2
Question 5
Figure 8 shows the changes in the levels of the hormones of the menstrual cycle. (a) (i) The maximum concentration of oestrogen is just before ovulation. Which is ... show full transcript
Worked Solution & Example Answer:Figure 8 shows the changes in the levels of the hormones of the menstrual cycle - Edexcel - GCSE Biology Combined Science - Question 5 - 2023 - Paper 2
Step 1
Step 2
Explain how two of the hormones shown in Figure 8 cause ovulation.
Answer
Two hormones involved in the ovulation process are Luteinizing Hormone (LH) and Oestrogen.
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LH Levels: Luteinizing Hormone (LH) plays a crucial role in triggering ovulation. A surge in LH levels, which occurs when oestrogen levels peak, signals the ovary to release the mature egg. Without adequate LH, ovulation would not occur.
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Oestrogen Levels: Oestrogen leads to an increase in LH production by stimulating the anterior pituitary gland. High levels of oestrogen in the follicular phase promote the maturation of the egg and prepare the lining of the uterus for potential implantation.