KNES 259 Study Guide - Final Guide: Inhibitory Postsynaptic Potential, Axon Hillock, Resting Potential
14 Dec 2016
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The structure of the neuron: a typical neuron consists of, dendrites, cell body, axon hillock, axon, axon terminals. Action potential summary: depolarization: the negative charge of the inside of the cell becomes more positive, the na+ gates open and there is an influx of na+ (depolarization occurs) Rising" part of the ap graph: repolarization: returning the membrane to its negative value after depolarization, the k+ gates open and there is an efflux of k+ (repolarization occurs) Falling" part of the ap graph: hyperpolarization: the cell becomes overly negative after repolarization, the k+ gates are slow to close, causing k+ ions to overshoot". Glial cells: 4 types of support cells in the cns, astrocytes, microglia, ependymal, oligodendrocytes. The autonomic system: a division of the peripheral nervous system that controls and regulates largely unconscious body functions (ie. heart rate, digestion, fight or flight, breathing, etc, consists of, sympathetic: fight or flight, parasympathetic: rest and digest.
