肌肉不完全强直收缩的特点是,每次新收缩的收缩期都出现在前一次收缩的舒张过程中。 ()
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当细胞外Na+浓度增高或细胞K+浓度增高时,钠泵就被激活,Na+、K+同时进行逆浓度转运。()
Compared with the Great wall within China, the newly found wall does not have watchtowers, which could be used to__________ during the wars.
骨骼肌收缩时,长度可以不缩短,而仅发生肌张力的变化。 ()