CellTypesReviewandPlasmamembrane细胞类型的审查与等离子体膜课件

CellTypesReviewandPlasma(cell)membraneCellTypesReviewandPlasma(1Section2Objectives–page175SectionObjectives

Identifythedifferencesbetweeneukaryoticandprokaryoticcells.ReviewthestructureandfunctionoftheplasmamembraneSection2Objectives–page172Section7.1Summary–pages171-174Cellsthatdonotcontaininternal membrane-boundstructuresarecalled prokaryoticcells.Thecellsofmostunicellularorganisms suchasbacteriadonothavemembrane boundstructuresandarethereforecalled prokaryotes.TwoBasicCellTypesSection7.1Summary–pages173Section7.1Summary–pages171-174Mostofthemulti-cellularplantsand animalsweknowaremadeupofcells containingmembrane-boundstructuresand arethereforecalledeukaryotes.Cellscontainingmembrane-boundstructures arecalledeukaryoticcells.7.1TwoBasicCellTypesSection7.1Summary–pages174Section7.1Summary–pages171-174Themembrane-boundstructureswithineukaryoticcellsarecalledorganelles.Eachorganellehasaspecificfunctionthatcontributestocellsurvival.TwoBasicCellTypesSection7.1Summary–pages175Section7.1Summary–pages171-174Thenucleusisthecentralmembrane-boundorganellethatmanagescellularfunctions.Separationoforganellesintodistinct compartmentsbenefitstheeukaryotic cells.TwoBasicCellTypesSection7.1Summary–pages176Section1CheckPlasmamembraneNucleusNucleolusChromosomesOrganellesCheck-up:

Whatmakesthiscelleukaryotic?A.Becauseithasmembrane-boundorganelles.B.BecauseitdoesnothaveDNA.Section1CheckPlasmamembrane7SummarySection2–pages175-178Alllivingcellsmustmaintainabalanceregardlessofinternalandexternalconditions.Survivaldependsonthecell’sabilitytomaintaintheproperconditionswithinitself.SummarySection2–pages175-8SummarySection2–pages175-178Whycellsmustcontrolmaterials

Theplasmamembraneistheboundarybetweenthecellanditsenvironment.SummarySection2–pages175-9SummarySection2–pages175-178Itistheplasmamembrane’sjobto:

allowwasteandotherproductstoleavethe cell.removeexcessamountsofthesenutrientswhen levelsgetsohighthattheyareharmful.allowasteadysupplyofglucose,aminoacids, andlipidstocomeintothecellnomatterwhat theexternalconditionsare.SummarySection2–pages175-10SummarySection2–pages175-178Thisprocessofmaintainingthecell’senvironmentiscalledhomeostasis.

Selectivepermeability

isaprocessusedtomaintainhomeostasisinwhichtheplasmamembraneallowssomemoleculesintothecellwhilekeepingothersout.SummarySection2–pages175-11SummarySection2–pages175-178WaterPlasmaMembraneSummarySection2–pages175-12SummarySection2–pages175-178StructureofthePlasmaMembraneTheplasmamembraneiscomposedoftwolayersofphospholipidsback-to-back.

Phospholipidsarelipidswithaphosphateattachedtothem.SummarySection2–pages175-13SummarySection2–pages175-178MakeupofthephospholipidbilayerThephosphategroupiscriticalfortheformationandfunctionoftheplasmamembrane.PhosphateGroupispolarlikewater.Thetailsarenon-PolaranddonotInteractwithwaterSummarySection2–pages175-14SummarySection2–pages175-178MakeupofthephospholipidbilayerThefluidmosaicmodel

describestheplasmamembraneasaflexibleboundaryofacell.Thephospholipidsmovewithinthemembrane.SummarySection2–pages175-15SummarySection2–pages175-178Othercomponentsoftheplasmamembrane:

Cholesterolplaystheimportantroleofpreventingthefattyacidchainsofthephospholipidsfromstickingtogether–itgivesitstrength.CholesterolMoleculeSummarySection2–pages175-16SummarySection2–pages175-178Othercomponentsoftheplasmamembrane:

Transportproteinsallowneededsubstancesorwastematerialstomovethroughtheplasmamembrane.Clickimagetoviewmovie.SummarySection2–pages175-17谢谢你的阅读知识就是财富丰富你的人生谢谢你的阅读知识就是财富18CellTypesReviewandPlasmamembrane细胞类型的审查与等离子体膜课件19CellTypesReviewandPlasma(cell)membraneCellTypesReviewandPlasma(20Section2Objectives–page175SectionObjectives

Identifythedifferencesbetweeneukaryoticandprokaryoticcells.ReviewthestructureandfunctionoftheplasmamembraneSection2Objectives–page1721Section7.1Summary–pages171-174Cellsthatdonotcontaininternal membrane-boundstructuresarecalled prokaryoticcells.Thecellsofmostunicellularorganisms suchasbacteriadonothavemembrane boundstructuresandarethereforecalled prokaryotes.TwoBasicCellTypesSection7.1Summary–pages1722Section7.1Summary–pages171-174Mostofthemulti-cellularplantsand animalsweknowaremadeupofcells containingmembrane-boundstructuresand arethereforecalledeukaryotes.Cellscontainingmembrane-boundstructures arecalledeukaryoticcells.7.1TwoBasicCellTypesSection7.1Summary–pages1723Section7.1Summary–pages171-174Themembrane-boundstructureswithineukaryoticcellsarecalledorganelles.Eachorganellehasaspecificfunctionthatcontributestocellsurvival.TwoBasicCellTypesSection7.1Summary–pages1724Section7.1Summary–pages171-174Thenucleusisthecentralmembrane-boundorganellethatmanagescellularfunctions.Separationoforganellesintodistinct compartmentsbenefitstheeukaryotic cells.TwoBasicCellTypesSection7.1Summary–pages1725Section1CheckPlasmamembraneNucleusNucleolusChromosomesOrganellesCheck-up:

Whatmakesthiscelleukaryotic?A.Becauseithasmembrane-boundorganelles.B.BecauseitdoesnothaveDNA.Section1CheckPlasmamembrane26SummarySection2–pages175-178Alllivingcellsmustmaintainabalanceregardlessofinternalandexternalconditions.Survivaldependsonthecell’sabilitytomaintaintheproperconditionswithinitself.SummarySection2–pages175-27SummarySection2–pages175-178Whycellsmustcontrolmaterials

Theplasmamembraneistheboundarybetweenthecellanditsenvironment.SummarySection2–pages175-28SummarySection2–pages175-178Itistheplasmamembrane’sjobto:

allowwasteandotherproductstoleavethe cell.removeexcessamountsofthesenutrientswhen levelsgetsohighthattheyareharmful.allowasteadysupplyofglucose,aminoacids, andlipidstocomeintothecellnomatterwhat theexternalconditionsare.SummarySection2–pages175-29SummarySection2–pages175-178Thisprocessofmaintainingthecell’senvironmentiscalledhomeostasis.

Selectivepermeability

isaprocessusedtomaintainhomeostasisinwhichtheplasmamembraneallowssomemoleculesintothecellwhilekeepingothersout.SummarySection2–pages175-30SummarySection2–pages175-178WaterPlasmaMembraneSummarySection2–pages175-31SummarySection2–pages175-178StructureofthePlasmaMembraneTheplasmamembraneiscomposedoftwolayersofphospholipidsback-to-back.

Phospholipidsarelipidswithaphosphateattachedtothem.SummarySection2–pages175-32SummarySection2–pages175-178MakeupofthephospholipidbilayerThephosphategroupiscriticalfortheformationandfunctionoftheplasmamembrane.PhosphateGroupispolarlikewater.Thetailsarenon-PolaranddonotInteractwithwaterSummarySection2–pag