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17 Cards in this Set
- Front
- Back
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Types of Digestion (2)
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Single celled- intracellular
Multi celled - extracellular |
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Ingestion
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Entry / Pre processing
Initial chemical breakdown |
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Digestion
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Mechanical/Chemical actions
Prepares nutrients for absorption Nutrients broken down into small molecules |
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The mouth
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Saliva begins processing food
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How are polsaccharides Digested
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Amylase
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Pharynx and Esophagus
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pathway to stomach
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Avian Adaption- Birds
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Crop- storage, no digestion
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The Stomach Cells (3)
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Mucus
Parietal Chief |
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Parietal Cells
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Secrete HCl , gastric acid (hydrochloric Acid)
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Chief Cells
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Secrete Pepsinogen-inactive pepsin-
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Vertebrate Stomach Layers -Gastrointestinal Layers
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Mucosa
submucosa Muscularis Serosa |
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Herbivore Stomachs
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Must digest cellulose- rely on microbes in rumen and reticulm
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The Small Intestine
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Nearly all digestion takes place here
Specialized for Increased surface area |
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Accessory organs of small intestine
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Pancreas- bicarbonate breaks down acidic chyme
Liver - secretes bile Gallbladder - stores bile |
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Pancreas Enzymes
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Secretes Hydrolytic enzymes
Trypsin and Chymotypisn break proteins down into small peptides Pancreatic Amylase break polysaccharides down into sugars Lipase breaks fat down into fatty acids/monoglycerides |
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The Large Intestine
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Shorter than small intestine
NO DIGESTION reabsorbs electrolytes and vit K |
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Enterogastrones - duodenal hormones
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Inhibit stomach contractions and prevent additional chyme from entering duodenum
CCK, Secretin, GIP, all inhibit gastric motility |
