PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which branch of the nervous system is directly responsible for voluntary skeletal muscle contractions?
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ANS
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SNS
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PNS
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CNS
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Explanation:
Detailed explanation-1: -The somatic nervous system is a component of the peripheral nervous system associated with the voluntary control of the body movements via the use of skeletal muscles.
Detailed explanation-2: -The sympathetic nervous system (SNS) regulates neuromuscular junction structure and function. The SNS regulates skeletal muscle motor innervation. Sympathetic neuron regulation of NMJ transmission declines with aging. Maintenance of sympathetic neurons attenuates muscle motor denervation and sarcopenia.
Detailed explanation-3: -It reveals that sympathetic neurons innervate most NMJs in skeletal muscles, and that this innervation is crucial for synaptic integrity and function.
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