Female reproductive system — A/L Biology

How do I practise Female reproductive system?

1 question with a worked solution

1. Which endocrine event directly triggers ovulation (release of the secondary oocyte from the Graafian follicle) during the human ovarian cycle?
   1. A) Peak secretion of human chorionic gonadotropin (hCG)
   2. B) Luteinizing hormone (LH) surge
   3. C) Sudden drop in progesterone concentration
   4. D) Inhibition of follicle-stimulating hormone (FSH) by inhibin
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   Correct answer: B) Luteinizing hormone (LH) surge

   High concentrations of estrogen secreted by the mature Graafian follicle exert positive feedback on the anterior pituitary and hypothalamus, causing a dramatic surge in Luteinizing Hormone (LH) around day 14 of a typical 28-day cycle, which triggers rupture of the follicle and ovulation.

   Show worked solution

   Step 1: Review female ovarian cycle hormonal dynamics. Step 2: Estrogen peak -> positive feedback triggers LH surge. Step 3: LH surge induces completion of meiosis I and follicle rupture (ovulation). Answer: Luteinizing hormone (LH) surge.
   Modelled on: the A/L Biology examination pattern

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Where does Female reproductive system fit in the syllabus?

Year 2 · Term 1