The diagram represents six developmental stages that may be seen within an ovary during a menstrual cycle - Scottish Highers Human Biology - Question 5 - 2023
Question 5
The diagram represents six developmental stages that may be seen within an ovary during a menstrual cycle.
(a) (i) State which of the numbered stages represents ovu... show full transcript
Worked Solution & Example Answer:The diagram represents six developmental stages that may be seen within an ovary during a menstrual cycle - Scottish Highers Human Biology - Question 5 - 2023
Step 1
State which of the numbered stages represents ovulation.
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Answer
Stage 4 represents ovulation.
Step 2
Name structure X.
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Answer
Structure X is the corpus luteum.
Step 3
Describe the process that leads to this decrease.
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Answer
The decrease in progesterone concentration is primarily due to a lack of LH (luteinizing hormone) that supports the corpus luteum. As LH levels drop, the corpus luteum degenerates, leading to a decrease in progesterone production.
Step 4
Describe one effect of the decrease in progesterone concentration.
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Answer
One effect of the decrease in progesterone concentration is that menstruation starts, as the endometrium (the uterine lining) begins to break down.
Step 5
Describe the action of these drugs.
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Answer
The drugs work to stimulate ovulation either by mimicking the action of FSH (follicle-stimulating hormone) and LH (luteinizing hormone) or by preventing the negative feedback of oestrogen on the pituitary gland.
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