NUTR 205 1nd Edition Lecture 7 Outline of Last Lecture I Dietary guidelines for Americans DGA 2010 set of nutrition recommendations that promote health and reduce II 2 new overreaching messages III Consume less of IV Consume more of V Other recommendations for building healthy eating patterns Outline of Current Lecture VI Organs and organ systems VII Digestion vs absorption VIII Digestive system secretions chemical digestion Current Lecture Organs and organ systems o Definitions Cell Basic structural and functional unit of living things Tissues Group of cells that are similar in structure and function Organ A structure tha tis made up of more than one tissue that performs a specialized function Organ system A group of organs that work together to perform a specific task Digestion vs absorption o What is the definition of digestion The breaking down of nutrients to be absorbed o What is the difference between mechanical digestion and chemical digestion Chemicals will help break down foods Mechanical is the physical breaking down of food ex Chewing o What is the definition of absorption The process of nutrients being brought into the body o Which comes first 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 Digestion absorption Digestive system secretions chemical digestion o Mucus is secreted from mucosal cells lining the digestive tract Moistens lubricates and protects o Enzymes speed up reactions For digestion help break down larger molecules into smaller ones o Hormones chemicals secreted from cells which travel through the bloodstream to signal cells in another part of the body