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action%20potential%202007%20for%20web

action%20potential%202007%20for%20web - Agitoxin Scorpion...

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Outline for Today
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The Nernst equation 1920 Nobel Prize (work at age 25)
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The Nernst Equation
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Concentration gradients established by ion pump
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Key Terms
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Action Potentials
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Sight and sound of Action Potentials
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Phases of the Action Potential
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Action Potential Threshold
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Action Potential Rate
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Ionic Basis of the Action Potential
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Ionic Basis of the Action Potential
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Ionic Basis of the Action Potential
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Voltage-gated Na + channel
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Voltage-gated Na + channel
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Voltage gated K + channel
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Summary of Action Potential
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Channel mutations and disease
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Ion channel toxins: Tetrodatoxin (TTX)
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Unformatted text preview: Agitoxin Scorpion Blocks potassium channels alpha-bungarotoxin Krait (snake) Blocks acetylcholine (nicotinic) receptor Anatoxin Algae Acetylcholine receptor agonist Apamin Honey bee Blocks potassium channels Atracotoxin Blue Mountains Funnel Web Spider Blocks voltage-gated calcium channels Batrachotoxi n Poison Arrow Frog Prevents sodium channels from closing beta-bungarotoxin Krait (snake) Inhibits release of ACh at neuromusuclar junction and blocks potassium channels Botulinum toxin Bacteria Blocks acetylcholine release Brevetoxin Red Tide Dinoflagellate Activates sodium channels Capsaicin Cayenne Pepper Excites peripheral nerve endings Charybdotoxi n Scorpion Blocks potassium channels Local anesthetics Action Potential Propagation Action Potential Propagation Speed Multiple Sclerosis...
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