Neco 2023 Biology Question 23
Practice objective / multiple choice question 23 from the 2023 Neco Biology examination.
In a 28‑day menstrual cycle the plasma estrogen concentration rises linearly from \(20\ \text{pg\ mL}^{-1}\) on day 1 to a peak of \(200\ \text{pg\ mL}^{-1}\) on day 12 and then falls linearly back to \(20\ \text{pg\ mL}^{-1}\) on day 28. An LH surge is triggered when the estrogen level exceeds \(150\ \text{pg\ mL}^{-1}\) for at least 24 h. On which day does the LH surge begin?
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About This Question
This is Neco 2023 Biology Question 23. It is one of the objective questions from the 2023 Neco Biology examination.
Difficulty level: Medium .
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