HNU 363 Lecture Notes - Lecture 3: Caffeine, Moodle, Glycogenolysis
Document Summary
Bioenergetics: the ability to convert food stuffs into a biologically useful form of energy. We are always transferring energy take energy from food, store it take energy from. Training improves ability to contract muscle and makes muscles bigger. Increase use of motor neurons go from approximately 30% to almost 100% Always have same amount of atp in cells only 3 seconds worth. Only 30% is used for muscle protein rest is used for normal body functions. Metabolism: sum total of all energy required to power cellular processes. 1 kcal = heat energy to raise 1 l water, 1oc (from 14o 15oc) Joules is the most precise measurement but we use calories. Energy as food = energy released as heat. Daily food diary still widely used better used qualitatively can remember what food consumed but not portion sizes. We know approximately how much energy is contained in food. Need to know how much energy is taken in by food.
