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BASIC EVENTS IN NERVE IMPULSE TRANSMISSION (Action Potential (ACTION…
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Na+ Stimulus that causes the sodium channels to open in response to any stimulus, allowing sodium to enter the cell and change the electrical measurement in the membrane to -70mV.
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Na+ Voltage gated channels, is also known as the threshold, voltage is at -55mV. When it reaches 30mV the gates will close and no more sodium will be allowed to enter the cell.
Has two gates, one is the activation gate, which opens when the membrane potential crosses -55mV. The other gate is the inactivation gate, which closes after a specific period of time.
K+ Voltage gate has only one gate, which is sensitive to a membrane voltage of -50mV. This gate doesn't open as quickly as the voltage-gated Na+ channel does.
Ca2+ Channels are channels that open up for calcium allowing calcium to bind to vesciles and release ACH.
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SODIUM POTASSIUM PUMP
The process of moving sodium and potassium ions across the cell membrance is an active transport process involving the hydrolysis of ATP to provide the necessary energy.
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