PSYC 211 Lecture Notes - Lecture 3: Membrane Potential, Resting Potential, University Of Manchester
14 Jun 2016
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Membrane potentials: difference between b/w inside the axon and the ecf is the membrane potential, resting potential is around -70 mv, we can stimulate the neuron by passing a + charge through another micro electrode. In its resting state the neuron is polarized value of the membrane potential (towards zero). The neuron is now depolarized: ap o. Is a rapid reversal of the membrane potential (inside of the membrane becomes positive). How the movement of ions create electrical charges ion is a charged molecule o cations + o anions - Forces of diffusion moves ion from high concentrations to low concentrations: electrostatic pressure refers to the attractive or repulsive forces between the charged ions. The membrane potential is maintained by the balance of diffusion and electrostatic forces o these forces are influenced by the concentration of the fluids inside the cell (intracellular) and outside the cell (extracellular)
