Biology (diet& exercise and pathogens)
- Created by: morgxnleigh
- Created on: 22-11-15 13:41
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- Biology
- Diet& exercise
- Regular exercise and a balanced diet are needed to keep the body healthy.
- Too little food leads to a person being underweight and prone to certain types of illness.
- too much food and not enough exercise leads to a person being overweight and other types of ill health.
- Nutrients
- A mixture of different types of food in the correct amounts is needed to maintain health.
- The main food groups are carbs, fat and protein.
- Carbohydrates
- potatoes, pasta, bread, bananas, sugar and rice
- a source of energy for life processes
- potatoes, pasta, bread, bananas, sugar and rice
- Fats
- cheese, butter, margarine and oils.
- a source of energy for life processes: fats are also needed to make cell membranes and to insulate our bodies.
- cheese, butter, margarine and oils.
- Proteins
- meat, fish, eggs and cheese
- growth and repair - building cells
- meat, fish, eggs and cheese
- Pathogens
- bacteria and viruses cause disease.
- Bacteria release toxins, and viruses damage our cells.
- White blood cells can ingest and destroy pathogens by producing antibodies that destroy the infectious microorganisms, and antitoxins to neutralise toxins created as a by-product.
- Bacteria
- Bacteria and viruses are the main types of pathogen. Bacteria are microscopic organisms.
- They come in many shapes and sizes, but the largest are only 10 micrometres long.
- Diseases caused by bacteria include:food poisoning cholera typhoid whooping cough.
- Diet& exercise
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