PSYC 1001 Chapter Notes - Chapter 3: Neuroglia, Axon Terminal, Cell Nucleus
Document Summary
Chapter 3 textbook notes: neuropsychology - the study of the brain, communication in the nervous system, cells in the nervous system: Neurons - individual cells in the nervous system that receive, integrate and transmit information. Glia - cells found throughout the nervous system that provide various types of support for neurons. Supply nourishment to neurons, structural support, remove neuron waste products, and provide insulation around many axons. Maybe receive and send signals: the neural impulse - complex electrochemical reaction. There are electrically charged ions in and outside neurons. The resting potential of a neuron is its stable, negative charge when the cell is inactive (~ -70 millivolts) When voltage of of neuron remains constant, cell is quiet/no messages sent. When neuron stimulated, channels in cell membrane open briefly letting na ions in. Action potential - very brief shift in a neuron"s electrical charge that travels along an axon.
