Waec Model Questions Vol1 2021 Biology Question 42
Practice objective / multiple choice question 42 from the 2021 Waec Model Questions Vol1 Biology examination.
A person touches a hot stove with the tip of the index finger. The distance from the fingertip receptors to the spinal cord is 0.50 m and the distance from the spinal cord to the forearm muscle is 0.60 m. Sensory nerve fibres conduct at 60 m s⁻¹, motor nerve fibres at 50 m s⁻¹. Each synapse (receptor‑spinal cord and spinal cord‑muscle) introduces a delay of 0.5 ms and the muscle‑contraction latency is 5 ms. Estimate the total reaction time (in milliseconds) from stimulus to muscle contraction.
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About This Question
This is Waec Model Questions Vol1 2021 Biology Question 42. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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