【判断题】多个阈下刺激作用于细胞产生的局部反应总合后使膜电位去极达阈电位水平,可引发动作电位。
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【判断题】横管和终池的膜在三联管处是相连通的。
A. 对
B. 错
【判断题】在强直收缩中,骨骼肌的动作电位会发生叠加或总和。
A. 对
B. 错
Smilingandlaughinghas actuallybeenshowntorelieve __________ andstress.
A. suburb
B. tension
C. substance
D. talent
Smoking was recognized by many people as a slightly dirty and __________ habit.
A. unpleasant
B. unpleased
C. pleasant
D. pleased