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Unformatted text preview: pharynx to the esophagus Can be voluntarily controlled • Digestion o Begins in the mouth o Mostly occurs in the stomach and small intestine • Positive feedback o Pepsinogen and HCl are secreted into the lumen of the stomach o HCI converts pepsinogen to pepsin o Pepsin then activates more pepsinogen, starting a chain reaction. Pepsin begins the chemical digestion of proteins • Elimination o Occurs in the colon o Main function is to recover water from what is no longer digestible • Things we can live without o Gallbladder Good for storage • Dental adaptation of animals for different diets o Carnivores Incisors and canines for ripping flesh o Herbivores Teeth with broad ridged surfaces for chewing plants o Omnivores Unspecialized dentition KEY THEMES • Positive feedback • Diffusion • Surface area/volume • adaptations...
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This note was uploaded on 04/26/2009 for the course EBIO 1220 taught by Professor Demig-addams during the Spring '07 term at Colorado.
- Spring '07