The nurse is reviewing the three types of neurons with the client. The client asks the nurse what is the function of the motor neuron. What is the best explanation of the motor neuron?
1 . Receives and transmits messages to the central nervous system from all parts of the body
2 . Receives and transmits messages from the central nervous system to muscle and glands in all parts of the body
3 . Usually has long dendrites and a short axon
4 . Usually has short dendrites and a long axon
A) 1, 3
B) 1, 4
C) 2, 3
D) 2, 4
D
Feedback:
Sensory (afferent) neurons receive and transmit messages to the central nervous system from all parts of the body. These messages include such factors as hormone levels, blood pH, touch, sound, light, and pressure. Sensory neurons usually have long dendrites and a short axon. Motor (efferent) neurons receive and transmit messages from the central nervous system to muscles and glands in all parts of the body. These messages are transmitted as motor output, which causes an action. The signals carried by motor neurons alter muscle activity or cause glands to secrete. Motor neurons usually have short dendrites and a long axon.
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