Progestorone is a hormone involved in the control of the menstrual cycle - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1
Question 3
Progestorone is a hormone involved in the control of the menstrual cycle.
The graph shows the level of progesterone in the blood of three women, labelled X, Y and Z,... show full transcript
Worked Solution & Example Answer:Progestorone is a hormone involved in the control of the menstrual cycle - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1
Step 1
Which stage of the menstrual cycle is occurring for person Y on day 10?
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Answer
On day 10, person Y is most likely in the menstruation stage, as indicated by the low levels of progesterone in the blood.
Step 2
Suggest a reason for the increasing progesterone level of person X.
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Answer
The increasing progesterone level in person X could be due to pregnancy or fertilization, as the hormone is produced to maintain the uterine lining.
Step 3
Explain the role of progesterone in the menstrual cycle.
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Answer
Progesterone plays a crucial role in the menstrual cycle by:
Maintaining and thickening the uterus lining: It ensures that the endometrial lining is well-prepared for potential implantation of a fertilized egg.
Inhibiting FSH and LH: Progesterone prevents the release of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH), helping stabilize the menstrual cycle.
Preventing menstruation: High levels of progesterone signal the body to prevent menstruation, which is essential if fertilization occurs.
