Neco 2024 Biology Question 25
Practice objective / multiple choice question 25 from the 2024 Neco Biology examination.
Normal blood calcium concentration is \(2.5\ \text{mM}\). After a sudden loss, the concentration falls to \(2.0\ \text{mM}\). The parathyroid glands respond by increasing parathyroid hormone (PTH) secretion by \(40\%\) above the basal level. Each \(10\%\) increase in PTH raises blood calcium by \(0.02\ \text{mM min}^{-1}\) through bone resorption, while the basal secretion maintains the set point. Assuming no other regulatory mechanisms act, estimate how many minutes are required to restore the calcium concentration to the normal level. Give your answer to one decimal place.
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About This Question
This is Neco 2024 Biology Question 25. It is one of the objective questions from the 2024 Neco Biology examination.
Difficulty level: Medium .
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