Preview

B1.1 Gcse Science Biology

Good Essays
Open Document
Open Document
370 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
B1.1 Gcse Science Biology
A healthy diet contains the right balance of the different foods you need and the right amount of energy

Carbohydrates and fats are needed to provide energy for your body chemistry to function correctly and to keep you warm at 37oC.

Proteins are used by the body to build cells - growth of new tissue, cell repair and cell replacement.

Mineral ions and vitamins are needed in small amounts for healthy functioning of the body - organs, skin, bones etc.

Fibre keeps everything moving smoothly through your digestive system.

A person is malnourished if their diet is not balanced.

Lack of a good healthy diet can cause a person to be overweight or underweight.

An unbalanced diet may also lead to deficiency diseases or conditions such as Type 2 diabetes.

People who live on a poorly balanced diet are malnourished and malnourishment is common in the poorer developing countries of the world e.g. in Africa.

You need energy to fuel the chemical reactions in your body to keep you alive and these reactions are called your metabolism.

People who exercise regularly are usually healthier than people who take little exerciseDiet and Exercise
Diet and Exercise
B1.1
B1.1
.
Microorganisms that cause infectious disease are called pathogens.

Bacteria and viruses may reproduce rapidly inside the body and may produce poisons (toxins) that make us feel ill.

Bacteria are very small cells which can rapidly reproduce in your body making you feel ill by damaging your body's cells and producing toxinsViruses & bacteria
Viruses & bacteria
B1.1
B1.1
.

Viruses are NOT cells and much smaller than bacteria and damage the cells in which they reproduce.

White blood cells help to defend against pathogens by: 1. Engulfing it; 2. Producing Anti-Bodies; 3. Producing Anti-Toxins
The immune system of the body produces specific antibodies to kill a particular pathogen.

Antibiotics cannot be used to kill viral pathogens, which live and reproduce inside cells.

You May Also Find These Documents Helpful

  • Powerful Essays

    Biology B1 Notes for Aqa

    • 1832 Words
    • 8 Pages

    Malnutrition- eating a diet which is not balanced which can lead to being overweight (obese), underweight or deficiency diseases (Rickets etc)…

    • 1832 Words
    • 8 Pages
    Powerful Essays
  • Satisfactory Essays

    Chemistry Life Worksheet

    • 307 Words
    • 2 Pages

    Carbohydrates are what the organism uses to convert to energy in order to function and keeps all organs operating.…

    • 307 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Viruses. These micro-organisms are very tiny. They invade living normal cells and use these cells to multiply and produce other viruses like themselves. Eventually this kills off the normal cell and can make you ill.…

    • 1403 Words
    • 6 Pages
    Good Essays
  • Good Essays

    Imagine spending your entire life trapped inside a bubble of antiseptic perfection,with no germs. You would develop a extremely weak immune system when the inevitable exposure to germs occurred you’d become extremely sick.…

    • 582 Words
    • 3 Pages
    Good Essays
  • Good Essays

    unit 21 task 2

    • 1294 Words
    • 6 Pages

    Carbohydrates are key components in a diet because they provide the body with energy. Carbohydrates are in comprising sugars, starchy food and dietary fibre. Starchy carbohydrates provide an important source of energy. Simple carbohydrates or sugars this is found in food such as fruit, vegetables, honey, milk and malt products. Simple carbohydrates are digested by the body quicker because they have got a simple chemical structure. Complex carbohydrates are found in cereals, corn flour, potatoes, pasta and flour. Complex carbohydrates absorb certain minerals and fatty acids. If you do not have enough carbohydrates then you would be tired and not have enough energy to do what you need to do in the day. This could also cause low blood…

    • 1294 Words
    • 6 Pages
    Good Essays
  • Good Essays

    What is Infection? Microbes can lead to an infection only if they have capacity to multiple. Our bodies get infections from pathogenic microorganisms that cannot observe by naked eye such as…

    • 347 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Fats: Fats are made up of carbon, hydrogen and oxygen and their main roles include providing the body with insulation (helping to maintain a constant temperature), participating in the production of hormones and absorption of vitamins, and as an important source of energy for the body. The main dietary sources of fat include meat, fish, dairy products, oils and fats used for cooking. Fats are a secondary source of energy and are used by your body in longer periods of exercise for example a marathon when your body has used all of your carbohydrate stores.…

    • 639 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Carbohydrates also provides the body with energy, it is in lentils, bread, beans, oats etc. You need them for physical activities and are important for throughout life. Without carbohydrate in our bodies we could lose weight, become tired and not having enough energy.…

    • 1063 Words
    • 5 Pages
    Good Essays
  • Good Essays

    • Bacteria cause disease by producing harmful chemicals, which are toxins of enzymes. These toxins kill or damage body cells. The damage to the body cells causes the symptoms of the disease.…

    • 374 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    Bacteria are a single celled organism that multiplies by themselves. The majority of bacteria’s are harmless and beneficial to the human body but some can cause infectious diseases. A bacterium usually affects one part of the body and doesn’t spread across or through the body. Bacterial infections are normally treated with a cause of antibiotics…

    • 376 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    1. A poor diet can come with consequenses of major health risks that can cause illness such as; heart disease, high blood pressure, type 2 diabetes, and certain types of cancer.…

    • 1310 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    Germs Research Paper

    • 936 Words
    • 4 Pages

    Germs, such as bacteria and viruses sometimes enter the body. When this happens, the bacteria or virus attack the body's cells and begin to multiply. When this happens, it is known as an infection which in turn make people ill. Our body uses its immune system to fight of the infection that has began spreading in the body.…

    • 936 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Healthy Eating

    • 919 Words
    • 4 Pages

    Having a healthy balanced diet affects every aspect of your health and appearance. Noticeable signs of an unhealthy diet are dull, weak hair; poor gum and teeth health, and weight gain. An unwholesome diet can also cause chronic illnesses such as diabetes, high cholesterol, and heart disease. Being conscious of what you eat through out the day will provide you with the energy and nutrients required to survive and stay healthy.…

    • 919 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Salmonella Essay

    • 724 Words
    • 3 Pages

    There are many things in the world that can make a person sick. A lot of times, it is a simple matter of just being careless, or ignorant of the facts, that causes a person to get sick from the foods or animals that they handle. One type of bacteria that can be picked up from these bad practices is Salmonella. If left unchecked, or if action isn’t taken, then this bacteria has the potential to develop into an illness, spread to other people, and possibly be the cause of an outbreak.…

    • 724 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Nutrition and You

    • 1615 Words
    • 7 Pages

    all must be in balance for the body to function properly. There are also five…

    • 1615 Words
    • 7 Pages
    Good Essays