Neco Model Questions Vol1 2017 Biology Question 39
Practice objective / multiple choice question 39 from the 2017 Neco Model Questions Vol1 Biology examination.
In a simple reflex arc, the sensory neuron conducts impulses over a distance of \(0.5\) m at a velocity of \(80\) m·s\(^{-1}\). The motor neuron conducts over \(0.4\) m at \(60\) m·s\(^{-1}\). The central synapse introduces a delay of \(0.5\) ms.\n\n(i) Calculate the total time from stimulus to muscle contraction.\n(ii) If the sensory distance is increased by 20 % and the motor‑neuron velocity decreases by 10 %, what is the new total time? (Give answers in milliseconds, rounded to one decimal place.)
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This is Neco Model Questions Vol1 2017 Biology Question 39. It is one of the objective questions from the 2017 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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