Igcse Model Questions Vol1 2025 Biology Question 37
Practice objective / multiple choice question 37 from the 2025 Igcse Model Questions Vol1 Biology examination.
In a simple reflex arc, the sensory neuron carries the impulse a distance of 0.8 m to the spinal cord at a conduction speed of 80 m s⁻¹. From the spinal cord to the effector muscle the motor neuron travels 0.4 m at 60 m s⁻¹. Each of the two synapses in the pathway introduces a delay of 0.5 ms. Calculate the total time from the initial stimulus to the beginning of muscle contraction, giving your answer in milliseconds (ms) to one decimal place.
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This is Igcse Model Questions Vol1 2025 Biology Question 37. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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