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GI Processes

Oral, Gastric

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
Created by: Kristel