BIOL 152 1st Edition Lecture 19 Outline of Last Lecture Animal Form and Body Outline of Current Lecture Animal Nutrition Current Lecture Animal Nutrition The Biology of Digestion Macromolecules too large and food building blocks Enzymatic Hydrolysis Digestive Compartments Avoid self digestion Intracellular digestion sponges o Food vacuoles and lysosomes o Extracellular digestion o Allows ingestion of larger food items Gastrovascular Cavity Alimentary Canal Mammalian Digestion Humans The mouth and esophagus o Mechanical and chemical o Salivary amylase breaks down glucose polymers AKA o Smooth muscles move food bolus down esophagus by peristalsis o Cardiac orifice lower esophageal sphincter The stomach o Stores food and secretes gastric juice pH 1 4 o Digestion of proteins o Heliopacter bacteria that causes ulcers o Lining replaced every 3d These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o o Acid chyme Anatomy of the stomach Three types of cells in the gastric glands 1 mucus cells 2 chief cells 3 parietal cells The small intestine Acid chyme mixes with digestive juices of the pancreas gall bladder liver and intestine Duodenum Dual role of pancreas Exocrine Endocrine Role of Liver and gall bladder Bile emulsify fat
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