NATS 1610 Lecture Notes - Lecture 12: Threshold Potential, Active Transport, Membrane Potential
27 Feb 2017
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Document Summary
The relegation of a nerve impulse begins with the inside becoming more negative, and the outside of the cell becoming more positive. If this charge pattern continues down the neuron, a single will be transmitted. A nerve impulse begins with the depolarization of the cell membrane, going from a charge of. Afterwards you get a period of depolarization, where the cell returns back to its initial charge of -70mv, and even continues onward becoming even more negative in its hyeprpolarization stage, where the charge is -80mv. There are different types of channels within a neuron: gated channels that open and close, leaky channels that allow for free movement of ions. Examples of these include sodium and potassium leaky channels. There are however many more potassium leaky channel than sodium leaky channels: there is the sodium potassium pump, that uses energy to pump in potassium, and pump out sodium.
