Question

Differentiate between sensory neuron and motor neuron.

Answer 1

Hint: Neurons are the structural and functional unit of the nervous system. Neurons provide most of the unique functions of the nervous system, such as sense, remembering, thinking, controlling muscle activity and regulating glandular secretions.

Complete answer

	Sensory Neuron		Motor Neuron
(i)	They have a cell body, long dendrites and short axons.	(i)	They have a cell body, short dendrites and long axons.
(ii)	Cell body and dendrites outside the central nervous system and anon inside CNS.	(ii)	Cell body and dendrites inside CNS and axons outside CNS.
(iii)	Sensory neurons bring sensory impulse from sensory organs to the central nervous system.	(iii)	Motor neurons carry motor impulse from the central nervous system to specific effectors.
(iv)	They are situated in the dorsal root ganglion of the spindle nerve.	(iv)	Are situated in the ventral root ganglion of the spinal nerve.
(v)	They follow different pathways.	(v)	They follow efferent pathway
(vi)	They are unipolar.	(vi)	They are multipolar
(vii)	An adult has an average of 10 million sensory nerves in the body.	(vii)	An adult has half million of motor neurons in the body
(viii)	Sensory neurons are found in eyes, ears, tongue, nose and skin.	(viii)	Motor neurons are found in muscles and glands

Note: Neurons have the ability to respond to a stimulus and convert it into an action potential i.e. electrical excitability. An action potential is an electrical signal that travels along the surface of the membrane of a neutron.