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MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesNervous TissuePart 01The material contained in these slides corresponds to your assigned readings found inChapter 12 of our text.MCB 244: Human Anatomy and Physiology I© University of Illinois Board of Trustees
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesObjectivesExamine the structural and functional organization of the nervous system.Examine the structural components seen in a typical neuron.Characterize the various types and functions of glial cells.Examine the cellular properties responsible for the resting membranepotential in neurons; specifically the roles active and passive transportprocesses play.Examine the roles of sodium, potassium and other factors in thegeneration and maintenance of the RMP.Examine the sequence of events leading up to the generation andpropagation of the action potential.
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesNeuronsNeurons are the key to the functioning of the nervous system.They serve as the basic “functional units” of the nervous systemRamon Santiago y CajalCamillo GolgiNobel Prize in Physiologyand Medicine1906
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesOrganization of the Nervous SystemTwo ways the nervoussystem is organized.1. Structural2. Functional
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesOrganization of the Nervous SystemTwo ways the nervoussystem is organized.1. StructuralCNS = brain andspinal cordPNS = regionsoutside of brain andspinal cord
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesOrganization of the Nervous SystemTwo ways the nervoussystem is organized.1.Structural2. FunctionalA.Afferent (sensory) divisionReceives sensory (‘afferent’)information(INPUT)fromreceptors and transmitsit to CNSSomatic sensory systemstimuliwe consciously perceive (e.g.tactile receptors in skin)Visceral sensory systemstimuliwe typically do not perceive (e.gheart, kidneys)Somaticsensory
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesOrganization of the Nervous SystemTwo ways the nervoussystem is organized.1.Structural2. FunctionalSomaticsensoryEfferent (Motor) nervous systemInitiates motorOUTPUTand transmits itfrom CNS toeffectors/effector organsSomatic motor systemsendsvoluntarysignals toskeletal musclesAutonomic motor system(visceral motor) sendsinvoluntarycommands toheart,smooth muscle, and glands– Hassympatheticandparasympatheticdivisions
MCB 244: Human Anatomy and Physiology I© University of Illinois Board of TrusteesOrganization of the Nervous SystemTwo ways the nervoussystem is organized.

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Term
Fall
Professor
BROWN
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University of Illinois Board of Trustees

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