NUTR 313 Lecture Notes - Lecture 10: Brown Adipose Tissue, Lean Body Mass, Indirect Calorimetry
Document Summary
Gaining 10+ pounds or 2 on your waist = bad sign. Energy balance the state in which energy intake, in the form of food and beverages, matches the energy expended, primarily through basal metabolism and physical activity: energy input = energy output. Calories from food intake = metabolism; digestion, absorption, and transport of nutrients; physical activity: positive energy balance means more calories in than out. Weight gain: negative energy balance means more calories out than in. Energy intake: bomb calorimeter an instrument used to determine the calorie content of a food. Ignites and burns a dried portion of food. Energy output: body uses energy for 3 purposes. Digestion, absorption, and processing of ingested ingredients. Energy expanded during fidgeting or shivering in response to cold: basal metabolism the minimal amount of calories the body uses to support itself in a fasting state when resting and awake in a warm, quiet environment.
