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Unit 5.doc

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Department
Kinesiology
Course
Kinesiology 3347A/B
Professor
Navy
Semester
Winter

Description
1UNIT 5 Contribution of Major Tissues to Somatic GrowthReadings Ch8 Ch 6 Ch7 142154Adipose TissueAll functional fat cells and tissues in the bodyThe Adipose organoComprised of adipocytesoLipid storageoStored for 4 purposesEnergyHighyieldPassive insulation and active heat regulationProtection to our visceraVery importantAesthetic Generally distinguishes male from female formsoFat storing releasing functionOtherwise not considered an adipocyteTwo major categories of adipose tissue with regards to locationoSubcutaneousMajor percentage of adipose organObesityoEssentialinternal deep visceral omental omentumfat sheath that covers visceraAround viscera2Nerve sheathsmotor developmentCover neuronsIf not developed properly can have CNS problems and motor deficienciesCell membranesImportant vital organs2 major types of adipose tissues with regards to structureoWhite tissueHighly abundantWhite adipocytesStructurally different than other adipocytes in the bodySingle large vacuole of lipid or triglycerideOrganelles compressed to periphery of cellCells arranged in lobules held together by collagenous connective tissueMature adipocytesRound in shape25 to 150 micrometersQuite large relative to other cells in the bodyInnervated and vascularizedMetabolically active tissueGlucose fatty acid lipoprotein and cholesterol metabolismControlled mostly by CNS quickly responsive tissueVery responsive to stimuliDistribution3All over the bodySome covering the visceraMostly superficial subcutaneousoBrown tissueMax absolute mass at birth 1 of adipose tissue mass1550 micrometers umRelatively smallSeveral small lipid dropsMany small vacuoles not one large central vacuolewhite tissueNucleus centrally locatedOrganelles not forced to peripheryLess responsive than white tissueHormones that act on brown tissue have to travel to nucleus firstPrimary function heat productionCold temperature animalsHighly abundantHighly vascularized and innervated by sympathetic NS fightorflightSurvival functionCan respond rather quickly to hormones and to energy stores to produce heat internallyHigh concentrations ofMitochondria where energy and heat are producedCytochromes structures upon which we produce energy
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