Distinguish between: (a) Afferent neurons and efferent neurons

Question:

Distinguish between:

(a) Afferent neurons and efferent neurons

(b) Impulse conduction in myelinated and unmyelinated nerve fibre

(c) Cranial nerves and spinal nerves

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(a) Afferent neurons and efferent neurons

Feature	Afferent (Sensory)	Efferent (Motor)
Function	Carry impulses to CNS	Carry impulses from CNS to muscles/glands
Direction	Body → CNS	CNS → Body

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(b) Impulse conduction in myelinated and unmyelinated nerve fibre

Feature	Myelinated	Unmyelinated
Conduction speed	Fast	Slow
Mechanism	Saltatory conduction (jumps node to node)	Continuous conduction along axon

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Feature	Cranial nerves	Spinal nerves
Number	12 pairs	31 pairs
Function	Head, neck, senses, face muscles	Body muscles, limbs, trunk, reflexes
Origin	Brain	Spinal cord