KNES 210 Lecture 4: BC 2 - energy systems
5 Dec 2016
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Nutrients from foods are the substrates for metabolism and are provided and. Bc 2: energy systems stored as: carbohydrates, fat, protein. Don"t use food directly as food but use bioenergetics to transform food into. Each cell contains chemical pathways that converts these substrates to. The energy we derive from food is stored in cells in the form of adenosine triphosphate (atp: atp serves as the immediate source of energy for most body functions including muscle contraction. Energy in biological systems is measured in kilocalories. One kilocalorie is the amount of heat energy needed to raise 1 kg of water, 1 degree celsius. 1 kilocalorie = 1000 calories = 1 calorie. Example: a can of soda has 200 calories. Energy sources: 200 calories = 200,000 calories = 200 kilocalories, the same applies to exercise when a fitness chart says you burn about 100 calories every mile you jog, it means 100 kilocalories.
