Action potential-1

Action potential-1 - The action potential: a review in 12...

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_-60_ mV Ligand -gated Na + channel (for example) Voltage -gated Ca ++ channel A neuronal cell at rest Ligand binds to the receptor and opens the channel Sodium rushes in Close to the receptor The action potential: a review in 12 slides
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Lipid bilayer K + Cl - Na + Cl - K + Cl - Na + Cl - Cl - K + Cl - Na + Cl - K + Cl - Na + K + Cl - Na + Cl - K + Cl - Na + Cl - Cl - K + Cl - Na + Cl - K + Cl - Na + 0 mV Stage 1: an equal distribution of + and - ions across the membrane. Na + Cl - Na + Cl - Na + Cl - Na + Cl - Cl - Na + Cl - Na + Cl - K + Cl - Na + K + Cl - K + Cl - K + Cl - Na + Cl - Cl - K + Cl - K + Cl - K + Cl - K + 0 mV Stage 2: The Na + /K + antiporter kicks in and exchanges Na for K (assume 1:1 for demonstration purposes here). Na + /K + This runs continuously
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0 mV Stage 3a: K + leak channels open up and potassium flows outside the cell (before view). -60 mV Stage 3b: K + leak channels open up and potassium flows outside the cell (after view). This runs continuously Na + Cl - Na + Cl - Na + Cl - Na + Cl - Cl - Na + Cl - Na + Cl - K + Cl - Na + K + Cl - K + Cl - K + Cl - K + Cl - Cl - K + Cl - K + Cl - Na + Cl - K + Na + /K + K + Na + Cl - Na + Cl - Na + Cl - Na + Cl - Cl - Na + Cl - Na + Cl - K + Cl - Na + K+ K+ K+ K+ K+ K+ Cl - Cl - Cl - Cl - Cl - Cl - Cl - K + Cl - K + Cl - K +
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Action potential-1 - The action potential: a review in 12...

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