Metabolism The chemical and physical processes occurring within

Metabolism • The chemical and physical processes occurring within the living cells of the body • Energy from food is used to maintain metabolism in order to carry out voluntary activities – Physical actions – Movements, such as walking, talking, etc. Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Parts of Metabolism • Anabolism – Chemical processes involved when molecules combine to build larger molecules – Used energy – ex: amino acids join to form protein • Catabolism – Chemical reactions in which large molecules break down into smaller molecules – Release energy – ex: breakdown of glucose to carbon dioxide and water Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Conditions Affecting Metabolism • Enough oxygen to supply blood cells • Sufficient water for hydration of cells • Way to rid the body of waste products - can be toxic if allowed to build up • Body temperature must be in an acceptable range • Absorbed nutrients and dissolved substances in the blood and cells must be at appropriate levels Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Tasks of Nutrients during Metabolism • Carbohydrates break down into energy for the body • Protein begins to repair and maintain cells • Fats are stored for future energy and adipose tissue Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.

Storing Energy from Metabolic Reactions • Some energy from food eaten is not used immediately • Stored as adenosine triphosphate (ATP) molecules to be released when the need arises Copyright © Notice: The materials are copyrighted © and trademarked ™ as the property of The Curriculum Center for Family and Consumer Sciences, Texas Tech University.