Neco 2021 Biology Question 38
Practice objective / multiple choice question 38 from the 2021 Neco Biology examination.
In nerve fibres, the conduction velocity (V) of an impulse depends on the axon diameter (d, in µm). For myelinated fibres the relationship is linear: \(V = a\,d\). For unmyelinated fibres the relationship follows \(V = b\,\sqrt{d}\). Experimental data show that a myelinated fibre of 12 µm diameter conducts at 72 m/s, and an unmyelinated fibre of the same diameter conducts at 6 m/s. Using these data, determine the constants a and b, then calculate the expected conduction velocity of an unmyelinated fibre with a diameter of 20 µm. Give your answer in metres per second to one decimal place.
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About This Question
This is Neco 2021 Biology Question 38. It is one of the objective questions from the 2021 Neco Biology examination.
Difficulty level: Medium .
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