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Humans {=can~can not} contract skeletal muscles voluntarily. | Humans {=can~can not} contract skeletal muscles voluntarily. | ||
//LEVEL:3 | //LEVEL:3 | ||
2014年11月18日 (火) 21:47時点における最新版
Skeletal muscles contract only when stimulated. Usually, this stimulation comes from motor neurons in human bodies. With denervation because of injury etc, skeletal muscles can no longer contract. Naturally, somatic nerves innervate the skeletal muscles and can contract them voluntarily.
Challenge Quiz
1.
Humans can can not contract skeletal muscles voluntarily.
2.
Skeletal muscles are innervated by somatic autonomic nerves.