Unit 5/21 P4 & M3

Topics: Energy, Muscle, Metabolism Pages: 7 (1784 words) Published: February 20, 2013
P4+M1 TASK 2

Functioning Of Body Systems
Each system in the body plays an important role in energy production, which supports the body in many ways: giving off a variety of movements and interacts systems which supply energy for the activity.

What is energy?
Energy can make changes possible. We use it for our every day lives, it helps to move cars over road and boats over water. Energy is also used to allow our bodies to grow, keep warm and help our minds think. Scientific define energy as the capacity to do work. Energy cannot be destroyed or created, only transported from one source to another.

Forms of energy
• Potential Energy:
Potential is the stored energy of position and the energy of position- gravitational energy. When an object is displaced from its original position and there is energy pulling it back to that position, this works with potential energy. This is when a moving object no longer has kinetic energy; it has potential energy instead. • Chemical energy:

Is energy stored which are in the bonds of the atoms and molecules. Batteries biomass, natural gas and coal are examples of stored chemical energy. When chemical energy is burnt it is converted to thermal energy such as burning wood in a fire place. In the human body the glucose is said to have ‘chemical energy’ this is because when chemicals react with oxygen, it releases energy. • Kinetic Energy:

Kinetic energy is the energy of motion, its all about where movement happens; even it’s just a simple movement, it still has kinetic energy, like just clapping, dancing, singing, writing, talking, etc. also it’s the energy of motion. [pic]

Role of the energy in the human body
The Cardiovascular system

The human body is made up of the heart and blood vessels; it helps cooling and transportation system for the human body. The main role is to circulate blood through a network of vessel throughout the body to provide individual cells with oxygen and nutrients that help dispose OFF waste (Carbon Dioxide) The Cardiac system gives us energy in the Mitochondria.

Metabolism is a collection of chemical reactions that take place in the body’s cell. It converts the fuel in the food of which that’s eaten into the energy needed to control everything we do, from moving to thinking to growing. Specific proteins in the body control the chemical reactions of the metabolism, and each of the chemical reaction is coordinated with their body functions. Hormones control the guidance and speed of metabolism. When a person is at rest the speed of metabolism is called basal metabolic rate, this measures the heat produced by metabolism. In the process of metabolism molecules in the digestive system break proteins down into glucose, fatty acids or amino acids, which can be used as an energy source in the body. These become absorbed into the blood, which transports them to the cells. Anabolism

The process of anabolism involves simpler molecules combining together to form complex compounds. The main function involves building and storing the proteins. The cells bring together amino acids to form structural and functional proteins. The functional proteins that individually catalyze chemical reactions occur and help fight off diseases that regulate the on-going body process. Cells work in the liver and the muscle, combining molecules of glucose to form glycogen – a compound which is stored. Catabolism

The process of catabolism produces energy that’s vital to all activities in the cells. It helps the breaking down of glucose, fatty acids and amino acids to keep the energy and the heat in process. As the process continues, newly digested food, storage glycogen are involved. Breaking down of the fatty acids takes place in two steps. The 1st step which is called Glycolysis, works without oxygen and it produces a small amount of energy. The 2nd stage which takes place is the stage of the Krebs cycle, in this...
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