当细胞外钾离子被去除 对钠钾泵的影响?A.It caused the pump to accelerate due to the larger outwardly directedpotassium gradient.B.It had little effect on the pump which is primarily responsible for extrudingsodium.C.It caused the pump

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当细胞外钾离子被去除 对钠钾泵的影响?A.It caused the pump to accelerate due to the larger outwardly directedpotassium gradient.B.It had little effect on the pump which is primarily responsible for extrudingsodium.C.It caused the pump
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当细胞外钾离子被去除 对钠钾泵的影响?A.It caused the pump to accelerate due to the larger outwardly directedpotassium gradient.B.It had little effect on the pump which is primarily responsible for extrudingsodium.C.It caused the pump
当细胞外钾离子被去除 对钠钾泵的影响?
A.It caused the pump to accelerate due to the larger outwardly directed
potassium gradient.
B.It had little effect on the pump which is primarily responsible for extruding
sodium.
C.It caused the pump to shuttle sodium across the membrane equally in both
directions.
D.It caused the pump to reverse direction,loading the cell with sodium and
producing ATP.
E.It caused the cell to depolarize which in turn accelerated the pump since it is
electrogenic.

当细胞外钾离子被去除 对钠钾泵的影响?A.It caused the pump to accelerate due to the larger outwardly directedpotassium gradient.B.It had little effect on the pump which is primarily responsible for extrudingsodium.C.It caused the pump
静息电位产生的基本原因是离子的跨膜扩散,和钠- 钾泵的特点也有关系.细胞膜内K+浓度高于细胞外.安静状态下膜对K+通透性大, K+顺浓度差向膜外扩散,膜内的蛋白质负离子不能通过膜而被阻止在膜内,结果引起膜外正电荷增多,电位变正；膜内负电荷相对增多,电位变负,产生膜内外电位差.这个电位差阻止K+进一步外流,当促使K+外流浓度差和阻止K+外流的电位差这两种相互对抗的力量相等时,K+外流停止.膜内外电位差便维持在一个稳定的状态,即静息电位.(静息电位钾离子外流大于钠离子内流）
当外膜钾离子浓度降低时,外面的正电荷也降低, 动作电位上升支——Na+内流所致.
动作电位的幅度决定于细胞内外的Na+浓度差,细胞外液Na+浓度降低动作电位幅度也相应降低.

静息电位产生的基本原因是离子的跨膜扩散，和钠- 钾泵的特点也有关系。细胞膜内K+浓度高于细胞外。安静状态下膜对K+通透性大， K+顺浓度差向膜外扩散，膜内的蛋白质负离子不能通过膜而被阻止在膜内，结果引起膜外正电荷增多，电位变正；膜内负电荷相对增多，电位变负，产生膜内外电位差。这个电位差阻止K+...

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静息电位产生的基本原因是离子的跨膜扩散，和钠- 钾泵的特点也有关系。细胞膜内K+浓度高于细胞外。安静状态下膜对K+通透性大， K+顺浓度差向膜外扩散，膜内的蛋白质负离子不能通过膜而被阻止在膜内，结果引起膜外正电荷增多，电位变正；膜内负电荷相对增多，电位变负，产生膜内外电位差。这个电位差阻止K+

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当细胞外钾离子被去除 对钠钾泵的影响?A.It caused the pump to accelerate due to the larger outwardly directedpotassium gradient.B.It had little effect on the pump which is primarily responsible for extrudingsodium.C.It caused the pump 钾离子浓度对心肌细胞电生理的影响 钾离子浓度对身体的影响 如何去除铁离子对COD测定的影响如果溶液中由于铁离子的存在呈淡黄色 铁离子此时对COD的测定影响大吗 如果对离体的心肌细胞施用某种毒素,结果钙离子吸收量明显减少,而钾离子的吸收量不受影响,其原因是什么 若对心肌细胞施用某种霉素,结果钙离子吸收明显减少,而钾离子、葡萄糖的物质的吸收量不受影响,其原因 若对心肌细胞施用某种霉素,结果钙离子吸收明显减少,而钾离子、葡萄糖的物质的吸收量不受影响,其原因 若对离体的心肌细胞使用某种毒素,结果钙离子吸收量减少,而钾离子不受影响,其原因是 当细胞外钾离子浓度上升会引起心肌细胞电生理特性怎样的改变 细胞外K离子浓度升高对心肌兴奋性和传导性各有什么影响?细胞外液缺乏Ca离子对心肌兴奋收缩耦联有何影响? 细胞外钾离子高浓度为什么会导致细胞膜对钾离子的通透性增强 高低温对钠—钾离子泵的影响 7.细胞在生长过程中,当细胞体积逐渐变大时,表面积与体积之比A.变小 B.变大 C.保持不变 D.其变化不会对细胞的生长产生影响 如果等压计的A、B管内空气未被去除干净,对实验结果有何影响?液体饱和蒸汽压的测定 降低细胞外液的Na离子浓度时,动作电位产生何种影响为什么, 胞外K离子怎样影响心肌细胞的兴奋性? 关于细胞膜电位变化的问题!当细胞膜受到刺激后,细胞膜对Na离子和钾离子的通透性是如何改变的?对钠的通透性是增加了还是减弱了? 细胞外K+浓度升高对心肌细胞兴奋性、传导性的影响