Lecture 1 Nutrition.pdf

Learning objectives 117.153/155 Animals and Agriculture Dr Nicola Schreurs What is digestiv...

Learning objectives 117.153/155 Animals and Agriculture Dr Nicola Schreurs What is digestive tract structure What are the processes of ([email protected]) and function? metabolism? AHA 3.64 What are the processes of How are the processes digestion? different in monogastric Nutrition How are the processes different in monogastric vs. ruminant? vs. ruminant? digestion End products metabolism Production & Food Today's lecture: of digestion Maintenance Learning0objectives What is in food? What are the end products What is the fate of What is animal nutrition? How is it measured? of digestion? How are they different absorbed nutrients? i.e., what are the Nutrition for production between the monogastric results of metabolism? vs. ruminant? Diet composition Diet analysis What is nutrition? Nutrition is providing nutrients (in the Food Eating form of food)to an organism (but essentially to provide fuel and material for cell processes) to support life. Requirements for nutrients There are 3 nutritional needs that need to be satisfied by the diet: 1. Fuel – a source of energy. ATP is generated from the oxidation of dietary nutrients Life Function Utilisation/ 2. Raw materials – to provide the building blocks Efficiency required for biosynthesis 3. Essential nutrients – to provide molecules for Productivity/ chemical reactions in the body. Health Performance Energy and ATP (adenosine triphosphate) Diet provides raw materials for synthesis Pi Pi Pi Adenosine 1 kg fresh grass 1kg barley grain 1 kg meat 1kg milk Energy from Energy available for cellular work & Water 820g 140g 726g 860g food synthesis Pi Pi Adenosine Protein 36g 112g 220g 37g + Pi Fat 10g 17g 44g 48g ATP is generated by the oxidation of dietary nutrients in cells. Carbohydrate 117g 705g