PSYC-2656EL Chapter Notes - Chapter 4: Electric Charge, Myofascial Trigger Point, Exocytosis
10 Jan 2017
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The main thing when it comes to action potentials. It is the charge inside the neuron at which an ion would be in equilibrium - equal amounts of that ion moving in and out of the neuron. It is determined by the concentration of that ion inside the neuron (with respect to the outside) and the electrostatic charge inside the neuron. What moves k+ out of the neuron: concentration gradient, electrostatic pressure, both 1 & 2, the need to be free and experience life at its fullest. Nernst equation: used to calculate ionic equilibrium potential. What would happen to the na+ ionic equilibrium potential if i increased na+ concentration inside the cell : it would become more positive, it would become more negative, it would stay the same. Membrane potential is the difference in electrical charge between the inside and outside of the neuron. Membrane is more permeable to potassium at rest. Gated ion channels ( sometimes open, sometimes closed)
