PSYC 2240 Lecture Notes - Lecture 1: Parasympathetic Nervous System, Myelin, Sympathetic Nervous System
29 Feb 2016
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Document Summary
Nervous system = composed with cells: neurons/nerve cells. Most important part of nervous system: glial cells. Provide support for neurons: neuron doctrine. The brain is composed of independent cells. Information transmitted from cell to cell across. Translate genetic instructions into proteins: neurons 4 zones. Receive information from other cell through dendrites. Single axon leads away from the cell body and transmits the electrical impulse: transmitting the message from electrical impulse to chemical. Axon terminals at the end of the axon communicate activity to other cells/neurons. Releasing chemical = neurotransmitters: neurons classified by shape, size, or function. One axons, many dendrites = most common type. Single extension branches into 2 directions, forming a receptive pole and an output zone. Convey information ore rapidly (fast: sending information more faster. Receive inputs from and send input to other neurons. Glial cells support neuronal activity: astrocytes. Star shaped cell with many processes that receive neuronal input and monitor activity.
