digestive system I

《digestive system I》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、F.4BiologyClassExerciseDigestionoffoodIName:___________________________Class:_______Group:______I.TrueORfalse(20marks)1.Faecesisnotametabolicwaste.()2.Faecescontainsundigestedfoodonly.()3.Starchandproteinmoleculesaretoolargetopassthroughthecellmembrane.()4.Duringdigestion,starchmo

2、leculesarebrokendowntosmallerandsimplermolecules.()5.Everythingweeatiscompletelydigestedandusedbyourbodies.()6.Theliverisapartofthedigestivesystem.()7.Thepancreasisapartofthealimentarycanal.()8.Inhumans,enzymesmustbepresentforthedigestionoffood.()9.Inhumans,digestionoffoodtakespla

3、ceinthewholealimentarycanal.()10.Humanscannotdigestplantfoods.()11.Humanscannotdigestcellulose.()12.Teetharenotinvolvedintheprocessofdigestion.()13.Thesmallintestineisforthedigestionandabsorptionoffood.()14.Digestionoffoodbeginsinthestomach.()15.Wecannotcontrolthemovementoffoodalo

4、ngthealimentarycanal.()16.Thealimentarycanalisalong,coiled,hollowmusculartube.()17.Thealimentarycanalofacowismorecomplicatedthanthatofaman.()18.Therearealotofusefulbacteriainthelargeintestineofaman.()19.Undigestedplantfibresslowsdownthemovementoffoodalongthealimentarycanal.()20.Wh

5、ensalivaisheated,itcannotdigestfoodbecausetheenzymesarekilled.()F.4BiologyClassexerciseDigestionoffoodIPage3TaskII:Conceptlearning1.Thediagramsbelowshowtheenzymaticdigestionoftwotypesoffoodmolecules:starchandproteinWhichdiagramshowsthedigestionofproteins?Giveareasontosupportyouran

6、swer.(3marks)¾¾¾¾®DiagramI¾¾¾¾®DiagramII_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

7、_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

8、____________F.4BiologyClassexerci