JAMB Biology 2011 Objective — Question 18

Question 18 of 60 from the Joint Admissions and Matriculation Board (JAMB) Biology 2011 Objective paper, with the correct answer and a full explanation.

Which of the following neurons may not have myelin sheath?

A. A. Effector cells
B. B. Intermediate neuronsCorrect
C. C. Motor neurons
D. D. Sensory neurons

Explanation

The myelin sheath insulates axons and speeds impulse conduction. Intermediate (association) neurons are typically unmyelinated.

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