ENERGY
Forms of energy – chemical, heat , light, sound, electrical and nuclear energy.
Chemical energy - energy stored within the bonds between molecules. The most common examples of chemical energy are fuels such as gasoline, coal, and natural gas Energy
Energy is needed:
•For blood circulation, lymph and tissue fluid throughout the body
•Breathing and taking in oxygen •Making new cells for growth and repair
•To transmit nerve impulses
•To build enzymes and hormones produced after digestion Health & Social Care • Unit 5
Energy in the body
The body needs energy to function. The process by which it gets this energy is called the metabolic rate. This rate is affected by:
exercise
proportion of fat to muscle
genes you may have inherited.
Reactions in the body
The reactions in cells are powered by ATP (adenosine triposphate - biochemical way to store and use energy)
Digested food creates glucose.
The glucose reacts with oxygen to create ATP.
What Is Metabolism
converts the fuel in the food we eat into the energy needed to power everything we do, from moving to thinking to growing.
It is a constant process that begins when we are conceived and ends when we die. If metabolism stops, living things die.
Metabolism
The digestive system is the group of organs that breaks down food so that the body can use it.
Food must be broken down all the way to its individual molecules to be useable. This involves a number of steps, and different organs to do different parts of the job.
Metabolism
Once food is broken down it provides energy for many essential body functions.
It provides the energy for all of our physical activity such as walking, playing sports, working, and talking.
It also provides the energy for other, more automatic, activities including breathing and thinking.
Food provides the energy for the nerves, muscles, and organs, including the heart, to continue working.
It provides the fuel to build and repair body tissues. Food energy is needed to regulate body organs and systems. It is the fuel that provides heat to keep our body temperature at a steady 37.2 degrees.
Metabolism
The digestive process begins in the mouth. The teeth and the muscles of the mouth begin the digestive process by breaking down the food into smaller bits.
Saliva, produced by the salivary glands, begins to digest the food before it is even swallowed.
Saliva and the other chemicals produced along the way to speed the digestive process are called digestive enzymes
How does metabolism work in humans? Starts with plants – through a process called photosynthesis – a green plant takes in
