Biology - B1 - AQA - GCSE - Keeping Healthy and Defending Against Infection

Josh Anderson
Mind Map by , created almost 4 years ago

Revision mindmap for Biology . Includes pathogen info and diet and exercise info.

Josh Anderson
Created by Josh Anderson almost 4 years ago
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Biology - B1 - AQA - GCSE - Keeping Healthy and Defending Against Infection
1 Diet and Exercise
1.1 Food Groups
1.1.1 Proteins Meat, fish, eggs and cheese. Growth and Repair - Building cells.
1.1.2 Fats Cheese, butter, margarine and oils. A source of energy. Cell membranes and insulating the body.
1.1.3 Carbohydrates Potatoes, pasta, bread, bananas, sugar and rice. A source of energy.
1.1.4 Mineral Ions
1.1.5 Vitamins
1.2 Poor diets can lead to deficiency diseases.
1.2.1 Too little vitamin D ---> Rickets (Affects growth of skeleton)
1.3 Metabolic rate
1.3.1 The speed at which chemical reactions take place in the body.
1.3.2 Affected by: Age Sex Inherited factors Muscle:Fat proportion Amount of physical activity
2 Defending Against Infection
2.1 Pathogens
2.1.1 Bacteria Multiply rapidly in warm and moist conditions. Microscopic. Living cells. When they enter the body, they release toxins that make humans feel ill.
2.1.2 Fungi Larger fungi include moulds and mushrooms
2.1.3 Viruses Reproduce inside host cells. Damage cells whilst doing so. Eventually, burst open host cell. Genetic material inside a coat of protein. Passed through bloodstream.
2.1.4 Disease-Causing Microbe
2.2 White Blood Cells
2.2.1 Ingest pathogens DO NOT SAY "EATS PATHOGENS"
2.2.2 Produce antibodies to destroy pathogens Bind to pathogens and damage/destroy. Coat pathogens to make them easier to ingest. Specific antibodies fit specific antigens.
2.2.3 Produce antitoxins to counter the toxin produced by pathogens
2.3 NOTE
2.3.1 Pathogens are not the disease, they CAUSE the disease.
2.3.2 White blood cells do not eat pathogens, they INGEST pathogens.
2.3.3 Antibodies and antitoxins are not living, they are SPECIALISED PROTEINS.
2.4 Vaccination
2.4.1 Works against bacteria - NOT VIRUSES Bacteria can be resistant to vaccination.
2.4.2 Contains weak/dead pathogens to make it easy for the white blood cells to deal with them.

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