Waec Model Questions Vol1 2025 Biology Question 11
Practice objective / multiple choice question 11 from the 2025 Waec Model Questions Vol1 Biology examination.
A reflex arc consists of a sensory neuron whose axon length from the receptor to the spinal cord is 0.8 m and a motor neuron whose axon length from the spinal cord to the effector muscle is 0.5 m. The sensory impulse travels at 80 m/s in myelinated fibres and at 20 m/s in unmyelinated fibres. The motor impulse always travels at 70 m/s (myelinated). Each synapse in the reflex adds a delay of 0.5 ms. The total observed latency from stimulus to muscle contraction is 0.025 s. Based on these data, decide whether the sensory neuron is myelinated or unmyelinated.
Answer Options
About This Question
This is Waec Model Questions Vol1 2025 Biology Question 11. It is one of the objective questions from the 2025 Waec Model Questions Vol1 Biology examination.
Difficulty level: Medium .
Master the Exam!
You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.