Neco Model Questions Vol1 2023 Biology Question 18
Practice objective / multiple choice question 18 from the 2023 Neco Model Questions Vol1 Biology examination.
In a simple reflex arc, the sensory neuron carries the impulse from a skin receptor to the spinal cord over a distance of \(0.8\) m at a conduction speed of \(50\) m s\(^{-1}\). The motor neuron then carries the impulse from the spinal cord to the effector muscle over a distance of \(0.6\) m at \(60\) m s\(^{-1}\). Synaptic transmission adds a delay of \(0.5\) ms, and the muscle requires \(20\) ms to develop a visible contraction after the motor impulse arrives. Calculate the total reaction time from the initial stimulus to the onset of muscle contraction, in milliseconds.
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This is Neco Model Questions Vol1 2023 Biology Question 18. It is one of the objective questions from the 2023 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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