PATH 3610 Study Guide - Final Guide: Tetanus, Poliomyelitis, Reticular Formation

• School: University of Guelph
• Department: Pathology
• Course: PATH 3610
• Professor: Rob Foster

Document Summary

Respiration (you can control this but if you hold your breath too long you"ll pass out) Composed of dendrites, cell body, and axon (allow rapid signal transmission over long distances) Myelin sheath increases speed of transmission of neural impulse. Within neuron by changes in electrical potential. Across synapses via neurotransmitters that bind receptors on next neuron or muscle cell (at neuromuscular junction) Acetylcholine: used by insects too, insecticides target the enzyme that breaks down this, increase its activity causing all their muscles to cramp. Blood brain barrier separates brain from body, set up by astrocytes, prevents passage of large molecule into brain. Macroglia: astrocytes (compose fibrous tissue in brain, nutrition) and oligodendrocytes (produce myelin) Microglia: macrophages and apc"s of cns (lymphocytes, neutrophils, and plasma cells can be recruited) Grey matter = groups of cell bodies. White matter = groups of axons and myelin. Detector: sensory nerves (afferent) detect changes and transmit signal to cns.