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In an action potential the ions that move are all positive ions - sodium and potassium.<\/p>\n\n
But the potential is relative. The potential outside of the cell is more negative compared to the potential inside of the cell.<\/em><\/p>\n\n
Here is an anology: Your friend Kabir (outside of the cell) has $2.65 in change (positive ions). He decides to give you (inside of the cell) $1.95 (positive ions flowing into the cell). Even though Kabir still has money (some positive ions), Kabir is -$0.70 compared to you. <\/p>\n"},"subContentId":"5c46d271-dd6a-46b1-8e74-ccda676531de","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"}},"pause":true,"displayType":"button","buttonOnMobile":false,"visuals":{"backgroundColor":"rgb(255, 255, 255)","boxShadow":true},"goto":{"url":{"protocol":"http:\/\/"},"visualize":false,"type":""},"label":"
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Voltage-gated <\/strong>means that the gate for the channel is opened and closed by detecting changes in nearby membrane potential. It is literally the fact that the membrane next door become really positive all of the sudden that triggered this potassium channel to open it's gates.<\/p>\n"},"subContentId":"f49db9e3-f524-4d1c-8e01-6f2fa2880a21","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"}},"pause":true,"displayType":"button","buttonOnMobile":false,"visuals":{"backgroundColor":"rgb(255, 255, 255)","boxShadow":true},"goto":{"url":{"protocol":"http:\/\/"},"visualize":false,"type":""},"label":"
What does Voltage-gated mean?<\/p>\n"},{"x":47.610921501706,"y":45.757575757576,"width":10,"height":10,"duration":{"from":201,"to":202},"libraryTitle":"Text","action":{"library":"H5P.Text 1.1","params":{"text":"
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The threshold potential is like the trigger. Once 'pulled', the neuron fires. Once an action potential is triggered, it is on<\/em>! <\/p>\n\n
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The signal that travels down the axon is electical, while the signal that travels across the synpatic cleft is chemical.<\/p>\n","
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