PSYC 220 study guide

PSYC 220 study guide - PSYC study guide Chapter 2.1: cells...

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PSYC study guide Chapter 2.1: cells of the nervous system Neurons receive information and transmit it to other cells The brain is composed of individual cells Golgi discovered a method of using silver salts to stain nerve cells so that it stained some cells without affecting  Structures of an animal cell Membrane: structure separates inside of cell from outside environment; most chemicals cant cross it; a few  charge ions (sodium, calcium, potassium, chloride) can cross through protein channels); small uncharged  chemicals (water, oxygen, carbon dioxide) can diffuse across it Nucleus: contains chromosomes Ribosomes: sites at which the cell synthesizes new protein molecules Endoplasmic reticulum: network of thin tubes, transport newly synthesized proteins Structure of a neuron Distinctive feature of a neuron is its shape conducts impulses along its axon to a muscle Sensory neuron: specialized at one end to be highly sensitive to a particular type of stimulation – different  kinds of sensory neurons have different structures Dendrites: branching fibers that get narrower near their ends; lined with specialized synaptic receptors which  receive info from other neurons; the greater the surface area, the more info can be received; some have dendritic 
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PSYC 220 study guide - PSYC study guide Chapter 2.1: cells...

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