1、细胞外K离子浓度 增大,内外K 离子浓度差将 减小,则K离子平衡电位 减小,平衡电位一般就是静息电位,浏览次数：1次悬赏分：0 | 离问题结束还有 14 天 23 小时 | 提问者：a369251 静息电位负值

1、细胞外K离子浓度 增大,内外K 离子浓度差将 减小,则K离子平衡电位 减小,平衡电位一般就是静息电位,
浏览次数：1次悬赏分：0 | 离问题结束还有 14 天 23 小时 | 提问者：a369251
静息电位负值 减小.2公式：平衡电位=60lg(膜外k离子浓度/膜内K离子浓度）mV,若细胞外K浓度增大,代入公式得 平衡电位 增大,静息电位增大.1和2矛盾?
3、膜对K通透性增大,静息电位为什么会增大,更趋向于平衡电位,静息电位不就是平衡电位吗?膜对Na通透性增大,静息电位为什么会减小?
没分了给了,抱歉!

1的电位减小是和k离子浓度刚刚增大的时候比较的,而不是一般状态下,
2公式你考虑细胞外k离子浓度上升,而没有想到细胞通过主动运输细胞内的k离子浓度也上升,所以平衡电位分子、分母都变大,电位变化应该是趋向原来的水平
3神经细胞内外K、Na离子浓度不同,K离子在细胞内的浓度远远大于细胞外的浓度,膜对K通透性增大,k离子外流,使细胞外正电荷变大,细胞内正电荷减小,造成电位变化,而na离子是细胞外的浓度远远大于细胞内的浓度,通透性变化,na离子内流,使细胞内正电荷变大,细胞外正电荷减小,电位变化

Acquaintance is a beautiful edge
give up a love you, not painful,
give a person you love, that was painful,mac eyeshadow palette,
fell in love with a loved one should not be more pai...

全部展开

Acquaintance is a beautiful edge
give up a love you, not painful,
give a person you love, that was painful,mac eyeshadow palette,
fell in love with a loved one should not be more painful,
if the affinity, time, space is not the distance,
together if missed the end of Ran can not agree.


not too concerned about everything, but without force,
let all revel ,
Escape may not be escaped, have not necessarily long,
love nothing more than to be happy The two were not happy, let a happy.


Love is a feeling, since the pain may feel love is a feeling of happiness
, since broken heart will feel Tianmi
Some are doomed to lose some edge No results were doomed,
do not necessarily have to love a person,
can I just get rid of you in my heart bit by bit.


like a person lost to Things like loss of a treasure,Oakley sunglasses cheap,
although regrettable, but it will not hurt
love lost,mulberry alexa, it will leave a wound will always faint pain
Do not be lonely and love, not because of indulgence and Lonely life.
met a beautiful edge, there is one thought called silence ....... ...

收起