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sarcoplasmic reticulum (肌质网)

名词解释题
2021-09-02 20:44
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正确答案

心肌和骨骼肌细胞中的一种特殊的内质网,其功能是参与肌肉收缩活动。肌质网膜上的Ca2+-ATP酶将细胞基质中的Ca2+泵入肌质网中储存起来,使肌质网Ca2+的浓度比胞质溶胶高出几千倍。受到神经冲动刺激后,Ca2+释放出来,参与肌肉收缩的调节。


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