Shivering with cold in winter is caused by

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(C) Shivering is a rapid,involuntary contraction and relaxation of skeletal (striated) muscles. These contractions occur in response to a drop in body

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Involuntary action of striated muscles

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(C) Shivering is a rapid,involuntary contraction and relaxation of skeletal (striated) muscles. These contractions occur in response to a drop in body temperature detected by the hypothalamus. Since these muscles are under involuntary control during this process and they generate heat through metabolic activity to warm the body,the correct answer is the involuntary action of striated muscles.

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