10 Feeding Types: Structure Meets Function Explain the adaptations of:HerbivoresCarnivoresOmnivoresExplain the Adaptations of:Suspension feedersSubstrate feedersDeposit-feedersFluid-feedersBulk-feeders
12 Mechanisms for food processing in animals IngestionDigestionAbsorptionEliminationFACT OR FICTION?When I’m really hungry I sometimes exclaim, “My stomach is digesting my leg!”
13 Comparative Anatomy Intracellular Digestion Extracellular digestion What adaptations does a paramecium have to digest food?Extracellular digestionBiodiversity of structural adaptationsgastrointestinal cavity vs. alimentary canalcrop, gizzard, or stomach?intestinesanus
16 Human DigestionIt is your responsibility to learn the sequence and function of primary and accessory digestive organs (see Fig 41.9).We will discuss these organs in relation to enzyme production and digestion
17 How does HCl aid in digestion? Why are so manydigestive enzymes secreted in an inactive form?
18 Digestive Enzymes: Could you describe how a Happy Meal is broken down? FigureFat digestionNucleic acid digestionProtein digestionFat (triglycerides)DNA, RNANucleotidesPancreaticnucleasesPancreatic lipaseGlycerol, fatty acids,monoglyceridesNucleotidasesNucleosidesNucleosidasesandphosphatasesNitrogenous bases,sugars, phosphatesAmino acidsDipeptidases, carboxy-peptidase, andaminopeptidaseSmall peptidesPancreatic carboxypeptidaseSmallerpolypeptidesPancreatic trypsin andchymotrypsinSmall polypeptidesProteinsPepsinCarbohydrate digestionPolysaccharidesDisaccharidesSalivary amylasepolysaccharidesMaltosePancreatic amylasesDisaccharidasesMonosaccharidesSmallintestine(enzymesfromepithelium)pancreas)StomachOral cavity,pharynx,esophagus
19 Structure Meets Function Absorption: Intestinal Villi, LactealDigestion associated with type of diet. The cecum (appendix)
20 Hormonal Control of Digestion Figure 41.19 3 Hormones:Gastrin-- stretch stimulates release, targets production of gastric juicesSecretin--release of bicarbonate from pancreasCCK--release of bile from liver123FoodBileLiverStomachSecretinand CCKChymeGastricjuicesGastrinGastricjuicesGallbladderCCKPancreasHCO3, enzymesDuodenumof small intestineSecretinCCKKeyStimulationInhibitionFigure 41.19
21 Nervous Control of Digestion Figure 41.21 SatietycenterEnteric division control digestive organsStimulation or suppression of hungerRole of genes in appetite and weight control?GhrelinInsulinLeptinPYYFigure 41.21
22 Check out the unit and online review Veins to heartMouthStomachEsophagusLymphatic systemLipidsAbsorbed food(except lipids)Hepatic portal veinAbsorbedwaterLiverSecretionsfrom salivaryglandsfrom gastricSmall intestineSecretions from liverSecretions from pancreasRectumAnusLargeintestineFigure 41.UN01Figure 41.UN01 Summary figure, Concept 41.322
23 Check out the unit and online review Figure 41.UN01 Summary figure, Concept 41.323
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