Psychology 2221B Lecture Notes - Lecture 4: Frontal Lobe, Saltatory Conduction, Acetylcholine

• School: Western University
• Department: Psychology
• Course: Psychology 2221B
• Professor: Shelley Cross- Mellor

Document Summary

Neural conduction and synaptic transmission textbook notes. Membrane potential: the difference in electrical charge between the inside and the outside of a cell. Inside of the neuron is negative with respect to the outside. Position tip of one electrode inside the neuron and one outside in the extracellular fluid. When both tips are in the extracellular fluid the voltage difference between them is. Resting potential: membrane potential of -70mv: potential inside resting neuron is 70mv less than that outside the neuron, neuron is polarized. Negatively charged proteins: synthesized and stay within the neuron. Four factors influence the resting potential and the unequal ion distribution. Two factors are homogenizing (distribute ions equally) Factors contributing to even distribution: selective permeability, sodium-potassium pumps 3na+ out / 2k+ in, factors contributing to uneven distribution. The neuron at rest differential permeability of the membrane: Moves 3 na+ out for every 2k+ in.