W4 GI Tract notes

W4 GI Tract notes - The Human Body Food to Fuel Chapter 4...

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The Human Body: Food to Fuel Chapter 4 The Gastrointestinal Tract and Its Functions Using Food as Fuel: Two Major Processes ______________________________ Breaking apart of food into smaller units Absorption Movement of the small units of food from the gut into the blood stream or lymphatic system for circulation Taste and Smell Odors stimulate nerves in the nose In the mouth, tastes, textures and temperatures combine with odors to create a perception of flavor Flavor is recognized through a sense of ____________________ Sight, smell, thought, taste and sound trigger the digestive tract to receive food The Gastrointestinal (GI) Tract Organization Mouth à anus Mouth, esophagus, ____________________, small intestine, large intestine, rectum Accessory organs Salivary glands, liver, pancreas, ____________________ Functions Ingestion: Chewing and swallowing Transport : movement of food through GI tract Secretion: Of digestive enzymes, acids, mucus and bile Absorption: Assimilate food and nutrients into blood and lymph Movement: Of undigested waste Elimination: Of digestive waste Layers Mucosa Circular muscle Longitudinal muscle Sphincter Overview of Digestion Physical movement _____________________ Segmentation Chemical Breakdown Enzymes Proteins that catalyze ________________________reactions breaking apart of water End is “ase” Lipase, sucrase, lactase Other secretions Acid breaks down proteins
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___________________________ in stomach Base neutralize acid in small intestine
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  • Spring '08
  • Short
  • Large intestine, intestine ­ Digestion, intestine ­ Absorption, Large intestine Nutrition, intestine ­ Bile

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W4 GI Tract notes - The Human Body Food to Fuel Chapter 4...

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