PSYC 2275 Lecture 4: Chapter 3
16 Feb 2017
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Resting membrane potential (how it is maintained and the forces involved) Lecture 5: neurophysiology: a difference in electrical potential across the membrane of a nerve cell during an inactive period. Diffusion: the spontaneous spread of molecules of one substance among molecules of another substance until a uniform concentration is achieved. Is the force that causes molecules of one substance to diffuse from regions of high concentration to low concentration. Selective permeability: the property of a membrane that allows some substances to pass through, the cell membrane of a neuron is permeable to k+ ions because of k+ ion channels but not to na+ The membranes allow certain molecules through which depends on the cell. The cell decides what it wants to let through. Concentration gradient: variation of the concentration of a substance within a region, molecules move along this until they are evenly distributed.
