Waec Model Questions Vol1 2021 Biology Question 24

Practice objective / multiple choice question 24 from the 2021 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2021 Biology Objective / Multiple Choice Medium Difficulty
Question 24 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • objective

In the normal menstrual cycle a pre‑ovulatory surge of luteinising hormone (LH) reaches about 25 IU and a minimum of 10 IU is required to trigger ovulation. A woman has a pituitary disorder that reduces the amplitude of LH surges by 40 % while follicle‑stimulating hormone (FSH) secretion remains unchanged. Will ovulation still occur in this woman?

Answer Options

A. Yes; the reduced surge (≈12 IU) still exceeds the 10 IU minimum, so ovulation can occur.
B. No; the reduced surge (≈15 IU) is close to the minimum and likely insufficient for ovulation.
Correct Answer C. Yes; the reduced surge (≈15 IU) still exceeds the 10 IU minimum, so ovulation can occur.
D. No; the reduced surge (≈15 IU) falls below the 10 IU threshold, preventing ovulation.
Correct Answer
C
Correct Option:
Yes; the reduced surge (≈15 IU) still exceeds the 10 IU minimum, so ovulation can occur.

About This Question

This is Waec Model Questions Vol1 2021 Biology Question 24. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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