Neco Model Questions Vol1 2025 Biology Question 47
Practice objective / multiple choice question 47 from the 2025 Neco Model Questions Vol1 Biology examination.
During a simple reaction‑time test, a stimulus is applied to the fingertip. The sensory nerve conducts the impulse 0.5 m to the spinal cord at 80 m·s\(^{-1}\). After one synapse (0.5 ms delay) the signal travels another 0.5 m via a motor nerve at 60 m·s\(^{-1}\) to the hand muscles, followed by a second synapse (0.5 ms delay) before the muscle contracts. The total measured reaction time is 150 ms. Calculate the central processing time (the time spent in the spinal cord and brain) and comment on whether the observed reaction time is reasonable.
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This is Neco Model Questions Vol1 2025 Biology Question 47. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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