Lecture 5 PSYCH 254
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This 2 page Class Notes was uploaded by Brianna Nelson on Tuesday February 16, 2016. The Class Notes belongs to PSYCH 254 at University of Wisconsin - Milwaukee taught by James Moyer in Spring 2016. Since its upload, it has received 26 views. For similar materials see Physiological Psychology in Psychlogy at University of Wisconsin - Milwaukee.
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Date Created: 02/16/16
Lecture 5 3 Parts of Neuron 1. Soma: ( Cell body) -contains nucleus -protein synthesis 2. Dendrite: transmits signals towards soma → input -some cells have few dendrites - some cells have many dendrites (bring info in) 2 types 3. Axon: transmits signals from soma → output -all cells have one axon* -axons can branch many times Axon terminal Dendrite spine Information flow between neurons Divergence vs convergence (sensory vs motor) *Anatomical classifications* 1. Unipolar call- axon/ dendrites same pole 2. Bipolar cell 3. Multipolar cells Cell Nucleus & Protein Synthesis Chromosomes – 23 pairs -final pair is sex chromosomes Genome Nucleic Acids DNA-4 nitrogen bases: adenine, thymine, cytosine, guanine RNA- blueprint for proteins Genetic Alterations Down Syndrome-“trisomy” of chromosome 21; faulty brain development -cognitive impairments -skeletal/soft tissue abnormalities Mental retardation- results from untreated PKU; linked to altered chromosome 12 Glial Cells 1. Glue that supports neurons in PNS/CNS; -provide nourishment -remove waste / dead neurons 2. Blood brain barrier- don’t want certain drugs to enter brain/ separate blood stream from brain Diffuse in blood brain barrier CO2 O2 Fat soluble Fat soluble→ lipophilic vs hydrophilic→water soluble, charged (Hydrophobic vs lipophobic) Myelination of Axons Schwann cell Oligodendrocytes Value of Myelination Speeds axonal transmission Assist in axon regeneration (Schwann cells only)