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ID:36692979
大小:6.24 MB
页数:52页
时间:2019-05-10
《Digestion and Infectious Diseases PP-2:6-1- 6-3消化和传染病》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、6.1Digestion★Explainwhydigestionoflargefoodmoleculesisessential.★Explaintheneedforenzymesindigestion.★Statethesource,substrate,productsandoptimumpHconditionsforoneamylase,oneproteaseandonelipase.★Drawandlabeladiagramofthedigestivesystem.6.1Digestion★Outlinethefunctionofthestoma
2、ch,smallintestineandlargeintestine.★Distinguishbetweenabsorptionandassimilation.★Explainhowthestructureofthevillusisrelatedtoitsroleinabsorptionandtransportoftheproductsofdigestion.Whyisdigestionnecessary?1.Ifyoueatotherorganisms(plants/animals),weneedtobreakitdownintoaformsuit
3、ableforourhumanbody.2.Mostofwhatweeatisfoodthatismadeupoflarge/complexorganicmolecules,whichourbodycannotuse.Largemoleculescannotpassintoyourcellmembranesthatlinetheintestine(absorbnutrients)whichpassintothebloodstream.Havetobesmallenoughtopassintoourcellsthroughdiffusion,facil
4、itatedtransport,oractivetransport.6.1DigestionDigestionisthechemicalbreakdownoflarge,insolublefoodmoleculesintosmall,solublemolecules(stuffourbodycanuseandabsorb!).Foodmoleculesbeforeandafterdigestion/breakdown6.1DigestionMoleculetypeMolecularformingestedMolecularformafterdiges
5、tionproteinproteinaminoacidslipidstriglyceridesglycerolandfattyacidscarbohydratespoly/di/monosaccharidesmonosaccharidesnucleicacidsDNA/RNAnucleotidesThelastmealyouateprobablyhadfoodfromplantsand/oranimals-oncelivingthings.TheselivingthingshavetheirownDNAwhichcodesfortheirspecif
6、icproteins.DigestionallowsyoutobreakdownindividualaminoacidssothatyourownDNAcanusethemasbuildingblockstosynthesizeproteinsyourbodycanrecognizeanduse.6.1DigestionOrderofdigestion:Ingestion:youeatthefoodDigestion:seriesofchemicalreactions,wherebyyouconverttheingestedfoodtosmaller
7、andsmallermolecules.Absorption:smallmoleculesareabsorbedthroughcellsofyourdigestivesystemandpassintonearbybloodvessels.Transport:yourcirculatorysystemdeliversthesmallmolecules/nutrientstoyourbodycells.6.1DigestionNeedforenzymesindigestion:Digestionoflargemoleculeshappensnatural
8、lyatourbodytemperaturebutonlyataveryslowrate.Enzymesar
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