BIOL273L Study Guide - Final Guide: Resting Potential, Alpha Motor Neuron, Activity Coefficient
22 Aug 2016
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Lab 1: generation of electrical potentials by an artificial membrane. Resting membrane potential arises partly because the cell membrane is more permeable to some ions than others. The existence of the rmp enables neurons to transmit sensory information to the spinal cord and brain and to send signals to effector organs. Action potential: a wave across the cell surface that disrupts the resting membrane potential, the charge can be reduced, increased, or reversed. Activity coefficient: the measure of how independently solute molecules or ions behave when they are dissolved. Asymmetry potential: the minute differences between the two electrodes can produce a slight bias in the reading. We use the asymmetry potential to correct average potential reading. Volts = 0. 199 t log (a1 a2) = 0. 199 (273 + 23) log ((0. 001 0. 966) (0. 010 0. 906)) The ussing chamber has two drain tubes and two air lines for each sub chamber.
