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謝謝你的閱讀知識就是財富豐富你的人生謝謝你的閱讀知識就是財富18CellTypesReviewandPlasmamembrane細胞類型的審查與等離子體膜課件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