下列有关人体运动器官和功能的叙述,正确的是( )   A. 由骨

下列有关人体运动器官和功能的叙述,正确的是(  )

   A. 由骨骼肌、骨和关节三者的协调配合,就能完成一个动作

   B. 骨骼肌具有受到刺激而收缩的特性

   C. 关节的基本结构包括关节头,关节囊和关节腔

   D. 人在伸肘时,肱二头肌收缩,肱三头肌舒张

答案

B

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