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范佳元

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燕庭磊3102(2013•云浮)如图是膝跳反射的示意图,据图回答下列问题:(1)从反射弧的结构来看,当叩击膝盖下的韧带时,[①]______接受刺激后产生神经冲动,冲... -
鱼孔婷13666268058 ______[答案] (1)图为反射弧结构示意图,图中的①是感受器,②是传入神经,③是神经中枢,④是传出神经,⑤是效应器.当叩击膝盖下的韧带时,①感受器接受刺激产生神经冲动,神经冲动沿着②传入神经传给③神经中枢,再沿着④传...

燕庭磊3102杂技演员关节活动幅度大,灵活性强,主要是长期训练使得( ) -
鱼孔婷13666268058 ______[选项] A. 滑液分泌量增加 B. 关节面软骨增厚 C. 关节韧带和关节周围肌肉伸展性提高 D. 关节囊和韧带增厚

燕庭磊3102(1)关节内的滑液存在于______中,对关节起润滑作用.(2)关节面上覆盖着一层光滑的______,可以减轻摩擦和振动.(3)______的外面有一些坚韧的韧带... -
鱼孔婷13666268058 ______[答案] 关节的基本结构包括关节面、关节囊和关节腔.关节面又分为关节头和关节窝.在关节头和关节窝的表面都覆盖着光滑的关节软骨.关节腔内还有滑液,关节囊里面和外面都有坚韧的韧带,所以,关节既牢固又灵活. 故答案为:(1)关节腔(2)关节软...