Digestion and Infectious Diseases PP-2：6-1- 6-3消化和传染病

《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