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Multiple Choice
How do the functions of the autonomic nervous system differ from those of the somatic nervous system?
A
The autonomic nervous system uses only acetylcholine as a neurotransmitter, while the somatic nervous system uses norepinephrine.
B
The autonomic nervous system operates only during sleep, while the somatic nervous system operates only during wakefulness.
C
The autonomic nervous system is responsible for sensory input, while the somatic nervous system is responsible for motor output.
D
The autonomic nervous system controls involuntary actions, while the somatic nervous system controls voluntary actions.
Verified step by step guidance
1
Begin by understanding the basic functions of the nervous system, which is divided into the central and peripheral systems. The peripheral system includes the autonomic and somatic nervous systems.
The autonomic nervous system (ANS) is responsible for regulating involuntary physiological processes, such as heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal. It operates subconsciously and controls the functions of internal organs.
The somatic nervous system (SNS), on the other hand, is responsible for voluntary control of body movements via skeletal muscles. It involves conscious control and is associated with activities such as walking, grabbing, and talking.
The neurotransmitters used by these systems differ. The ANS uses both acetylcholine and norepinephrine, depending on whether the sympathetic or parasympathetic division is activated. The SNS primarily uses acetylcholine to stimulate muscle contractions.
Summarize the key difference: The autonomic nervous system controls involuntary actions, such as heart rate and digestion, while the somatic nervous system controls voluntary actions, such as movement and speech.