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Describe the role of energy in the body and the physiology of three named body systems in relation to energy metabolism.

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P4- describe the role of energy in the body and the physiology of three named body systems in relation to energy metabolism. Energy can be defined as the capacity of a physical system to perform work. It comes in many different forms, chemical energy being the most common, and it can be divided into two main categories kinetic and potential. But I am going to talk about energy metabolism, which consists of all the chemical reactions in the human body either using or releasing energy from different chemical substances. Energy can be converted from one form to another, but it cannot be created nor destroyed. ...read more.


The large complex molecules made during anabolic reactions are carbohydrates, proteins and lipids. The opposite of anabolic reactions is catabolic reactions these are reactions that involve breaking down complex molecules to release energy. The energy catabolic reactions make help anabolic reactions happen. As the complex molecules are broken down the waste products of the process are removed from the body through the skin, kidneys, lungs and intestines. There are three systems which are involved in energy supply to the cells around the body; these are the cardiovascular, digestive and respiratory. Both the digestive and respiratory systems are important in the production of energy's main ingredients, glucose and oxygen; they make energy by cellular respiration. ...read more.


As this is happening the respiratory system is persistently refreshing and reloading oxygen into the lungs, and disposing of carbon dioxide and water via the process of breathing. Dissolved oxygen passes through the lean alveolar walls in the lungs into the bloodstream and is transported to all the other cells in the body. This means that all body cells have a constant relief of glucose, oxygen and other raw materials so that the breakdown process of glucose oxidation (C6H12O6 + 6O2 � 6CO2 + 6H2O) can occur and release energy. This takes place in the cytoplasm and is completed in the mitochondria. The released energy is trapped as chemical energy in Adenosine triphosphate (ATP). ?? ?? ?? ?? Karlie Jane Whitmore Unit 5- Health and Social Care ...read more.

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