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GI Processes
Oral, Gastric
Question | Answer |
---|---|
What is the definition of Digestion? | GROSS & Molecular breakdown |
What is the definition of Secretion? | addition of Exocrine products: Digestive Enzymes, Emulsifiers, Acids, Mucus |
What is the definition of Motility? | Wave Propulsion & Mixing of material throughout the digestive tract |
What is the definition of Absorption? | TRANSFER of Molecules ACROSS the Intestinal wall --> Circulatory/Lymphatic systems |
What is Saliva composed of? | 97% Water, s. Amylase |
How is Salivation increased? | Pressoreceptors & Chemoreceptors --> Medulla --> ANS stimulation --> Increased Salivation |
What senses prompt Salivation? | Sights, Smells, Tastes, Sounds |
What Gastric Juices are from Glands in the Stomach? | HCl, pepsin |
What is the function of HCl? | denatures food Proteins, Activates Pepsin, kills bacteria |
What is the function of Pepsin? | Protein hydrolysis --> Polypeptides; pH optimum <2.0 |