PSYC 271 Lecture Notes - Lecture 8: Action Potential, Hydrophile, Ion
14 Dec 2015
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Neurons communicate info over long (& short) distances by electricity. Signals from other cells detected by other neurons; when signals are sufficient, neuron fires; generates electrical current (at soma) that travels down the axon to the synapse = action potential. Everything made up of tiny atoms that contain 3 elementary particles (1) proton (2) neutrons (3) electrons; each particle has diff properties. Protons heavy; carry positive charge o: neutrons heavy; carry neutral charge o o o. Ions atoms can gain or lose electrons. = changes charge of atom (positive = cation; negative = anion); opposites attract/ alike repel; ions can then be pushed apart or together by electrical forces: molecules: atoms that have been combined together; can also carry charges. Polar molecules positive & negative regions (ex. Polar & nonpolar molecules don"t mix well (ex. Polar molecules like each other; get closer (ex.
