Igcse Model Questions Vol1 2025 Biology Question 19
Practice objective / multiple choice question 19 from the 2025 Igcse Model Questions Vol1 Biology examination.
In a simple reflex arc the sensory neuron is \(0.8\;\text{m}\) long, the interneuron \(0.4\;\text{m}\) and the motor neuron \(0.6\;\text{m}\). Their conduction velocities are \(80\;\text{m·s}^{-1}\), \(40\;\text{m·s}^{-1}\) and \(60\;\text{m·s}^{-1}\) respectively. Each synapse introduces a delay of \(0.5\;\text{ms}\). Determine the total time (in milliseconds) from the initial stimulus to the resulting muscle contraction.
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This is Igcse Model Questions Vol1 2025 Biology Question 19. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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