Neco Model Questions Vol1 2023 Biology Question 40
Practice objective / multiple choice question 40 from the 2023 Neco Model Questions Vol1 Biology examination.
Parathyroid hormone (PTH) is released when blood calcium falls below 1.2 mM. The rate of calcium release from bone is \(R = 0.8\,(1.2 - [Ca])\) µmol·min⁻¹ for \([Ca] < 1.2\) mM; otherwise the rate is zero. The kidneys reabsorb a constant 0.05 µmol·min⁻¹ of calcium. Each µmol of calcium added to the blood raises the concentration by 0.001 mM. If a patient's blood calcium concentration is 0.90 mM, how many minutes will be required to raise it to the set‑point of 1.2 mM, assuming the release rate remains constant at its initial value?
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About This Question
This is Neco Model Questions Vol1 2023 Biology Question 40. It is one of the objective questions from the 2023 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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