Gce Model Questions Vol1 2021 Biology Question 43
Practice objective / multiple choice question 43 from the 2021 Gce Model Questions Vol1 Biology examination.
A simple reflex arc involves a sensory neuron whose axon length from the receptor to the spinal cord is 0.8 m and a motor neuron of length 0.6 m. Conduction velocity in myelinated fibres is 80 m·s⁻¹, while in unmyelinated fibres it is 2 m·s⁻¹. The sensory neuron is myelinated and the motor neuron is unmyelinated. Synaptic transmission at the central synapse adds a delay of 0.5 ms. Calculate the total time from the stimulus reaching the receptor to the onset of muscle contraction, giving your answer in milliseconds.
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About This Question
This is Gce Model Questions Vol1 2021 Biology Question 43. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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