PSYC 2P35 Chapter Notes - Chapter 2: Oligodendrocyte, Thiamine, Membrane Potential
15 Jan 2016
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Psyc 2p35 chapter 2: nerve cells and nerve impulses. Nervous system consists of 2 types of cells: neurons and glia. Neurons: receive info and transmit it to other cells. Mitochondrion: structure that performs metabolic activities, providing energy that the cell needs for all other activities. Ribosomes: sites at which the cell synthesizes new protein molecules. Endoplasmic reticulum: network of thin tubes that transport newly synthesized proteins to other locations. Motor neuron: has its soma (cell body) in the spinal cord; receives excitation from other neurons through its dendrites and conducts impulses along its axon to a muscle. Sensory neuron: specialized at one end to be highly sensitive to a particular type of stimulation like light, sound or touch. Dendrites: branching fibres that get narrower near their ends. Dendritic spines: the short outgrowths that increase the surface area available for synapses. Axon: thin fiber of constant diameter, in most cases longer than the dendrites.
