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英语
题目

Factors that affect heat production include __.A. skeletal musclesB. food intakeC. all of the aboveD. thyroxine

Factors that affect heat production include __.

A. skeletal muscles

B. food intake

C. all of the above

D. thyroxine

题目解答

答案

C. all of the above

解析

本题考查影响产热的因素相关知识点。解题思路是分别分析每个选项所涉及的因素是否会对产热产生影响,若都有影响,则正确答案为包含所有这些因素的选项。

  • 选项A:骨骼肌(skeletal muscles)
    骨骼肌在运动或战栗时会进行收缩活动,这个过程需要消耗能量。根据能量守恒定律,能量的消耗会以热能的形式释放出来,从而增加机体的产热量。例如,当人进行剧烈运动时,骨骼肌收缩频繁,身体会明显发热,这就说明骨骼肌是影响产热的一个重要因素。
  • 选项B:食物摄入(food intake)
    食物在体内经过消化、吸收和代谢的过程,会释放出能量。其中一部分能量用于维持身体的各种生理活动,而另一部分则以热能的形式散发出来。不同种类的食物,其产热能力也有所不同。例如,碳水化合物、脂肪和蛋白质在体内氧化分解时都会产生热量,所以食物摄入会影响机体的产热。
  • 选项D:甲状腺素(thyroxine)
    甲状腺素是由甲状腺分泌的一种激素,它可以提高机体大多数组织的代谢率。当甲状腺素分泌增加时,细胞的代谢活动增强,能量消耗增多,产热也会相应增加。例如,甲状腺功能亢进的患者,由于甲状腺素分泌过多,身体代谢加快,产热增加,会出现怕热、多汗等症状,这表明甲状腺素对产热有影响。

由于选项A、B、D所涉及的因素都会影响产热,所以正确答案应该是包含所有这些因素的选项C。

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