Course Hero Logo

Topic 5 Objectives 1-6 [Autosaved].pptx - BIOL 203 – Topic...

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 1 - 10 out of 40 pages.

BIOL 203 – Topic 5The NervousSystem1
Objective 1:Functions of the Nervous SystemThe functions include:Control of the physiological parameters of the bodyWith the endocrine system, maintain homeostasisIs the origin of thought, memory and emotionsTypical pathway1. (Afferent Sensory neuron)(3. Motor Efferent neuron)22. (Integration neuron)
Objective 2Discuss how the nervoussystem is organized usingthe following terms:312345a5b6a6b
Central nervous system (CNS)Peripheral nervous system (PNS)Sensory (afferent)divisionMotor (efferent) divisionSomatic nervoussystemAutonomic nervoussystem (ANS)SympatheticdivisionParasympatheticdivisionObjective 2Two major divisions:1. Central Nervous System(CNS):Consists of the brain andthe spinal cord(integrationcenters)2. Peripheral Nervous System (PNS):Consists of nerves that carry impulsesbetween the CNS and receptors or effectors(afferent and efferent communication)
Peripheral Nervous SystemConsists of:ReceptorsAfferent nerves: Visceral (ANS) or SomaticControl centerEfferent nerves:Visceral (ANS) or SomaticEffectors5
Definitions:Afferent: information travelling from the periphery to the CNS,usually sensory (PNS:Vegus nerve, SNS: glossopharyngeal nerve)Efferent: information traveling from the CNS to the periphery, usuallymotor to muscle or glandsVisceral: referring to organs, smooth muscle, cardiac muscleSomatic: referring to skin, skeletal muscle or jointsNerve:a structure of the PNS that carries action potentials betweenthe central nervous system, effectors and receptors in the body6
DefinitionsSpinal nerves:31pairs of nerves attachedto the spinal cordCranial nerves:12 pairs ofnerves that are attached tothe brain7
Autonomic nervous system (ANS):visceral nervous system,involuntarySympathetic divison (SNS):-mobilizes body during stress(fight or flight)Parasympathetic division (PNS):conserves energy, active at rest8
Figure 11.2Levels of organization in the nervous system.Central nervous system (CNS)Brain and spinal cordIntegrative and control centersPeripheral nervous system (PNS)Cranial nerves and spinal nervesCommunication lines between the CNSand the rest of the bodySensory (afferent) divisionSomatic and visceral sensorynerve fibersConducts impulses fromreceptors to the CNSMotor (efferent) divisionMotor nerve fibersConducts impulses from the CNSto effectors (muscles and glands)Somatic sensory fiberSkinSomatic nervoussystemSomatic motor(voluntary)Conducts impulsesfrom the CNS toskeletal musclesAutonomic nervoussystem (ANS)Visceral motor(involuntary)Conducts impulsesfrom the CNS to

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 40 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Fall
Professor
zeendermorris

Newly uploaded documents

Show More

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture