01:119:116 Lecture Notes - Lecture 23: Calorie, Triglyceride, Heterotroph
18 Jun 2020
School
Department
Course
Professor
Document Summary
Chapter 41. 1 & 41. 5: animal nutritional needs. Nutrition= food taken into body, broken apart, and used b body. An animal"s diet must provide e to produce atp which powers cellular processes and activities: the chemical e in food. Nutritionists measure energy value of food in calories. Calorie (spelling with a capital c) is kilocalorie= 1000 calories. Definition of calorie= amount of heat required to raise temp of 1 kg of water by 1 degree centigrade: source of chemical e, carbohydrates. Tend to be ingested in form of starch or cellulose (long chains of glucose) Principle sources of energy in human diet provide ~50% of calories ingested. 1 gram ~ 4 kilocalories : lipids. Most lipids in our diets are triacylglycerols (triglycerides)= glycerol and 3 fatty acids. 1 gram= 9 kilocalories : organic building blocks for macromolecules. This nutritional need must be satisfied by diet.
