At first, the neurone is at rest. The sodium potassium pump uses ATP to actively transport 3 sodium ions out and 2 potassium ions in. Gated sodium channels are closed. The neurone is polarised at -70mV., When a nerve impulse is stimulated, a small number of voltage gated sodium ion channels open, allowing sodium to diffuse in., This means the neurone becomes less negative - a potential difference of -50mV., When this threshold of -50mV is reached, the rest of the gated sodium ion channels open, causing rapid diffusion of sodium into the axon - depolarisation., This makes the inside of the neurone more positive than the outside with a potential difference of +40mV., Sodium ion channels now close and potassium ion channels open, causing potassium to flood out of the cell., This makes the inside of the neurone more negative again - repolarisation..
0%
Action potential order
共用
共用
共用
由
Jmullinger
Y12
Y13
Biology
編輯內容
嵌入
更多
排行榜
顯示更多
顯示更少
此排行榜當前是私有的。單擊
共用
使其公開。
資源擁有者已禁用此排行榜。
此排行榜被禁用,因為您的選項與資源擁有者不同。
還原選項
排名順序
是一個開放式範本。它不會為排行榜生成分數。
需要登錄
視覺風格
字體
需要登錄
選項
切換範本
顯示所有
播放活動時將顯示更多格式。
打開結果
複製連結
刪除
恢復自動保存:
?