Biology B1

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What is a healthy diet?
A healthy diet is a diet which contains the right balance of different foods we need and the right amount of energy
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What do we need for a balanced and healthy diet?
Water, Carbohydrates, Fats, Proteins, Fibre and Minerals and Vitamins
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What is the use of CARBOHYDRATES?
Provides energy for muscles, provides food for the central nervous system, enables fat metabolism
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What is the use of FATS?
Give the body energy, support cell growth, protect your organs and keep your body insulated
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What is the use of PROTEIN?
Growth and repair of tissues. Also used to make enzymes, hormones and body chemicals
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What is the use of MINERALS AND VITAMINS?
Help boost your immune system, can aid in wound healing faster, they also convert food into energy and help repair cellular damage.
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What is the use of WATER?
Used in all cells, organs and tissues to regulate temperature and maintain bodily functions. Aids in digestion, cushions organs, transports nutrients and flushes out toxins
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What is the use of FIBRE?
Helps lower cholesterol, prevent diabetes and heart disease. Removes waste, toxins and materials that your body doesn't need
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Definition of MALNUTRITION
lack of proper nutrition, caused by not having enough to eat, not eating enough of the right things, or being unable to use the food that one does eat.
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Give 2 examples of deficiency diseases
Rickets, Type 2 diabetes
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At what point will a person loose weight?
When the amount of energy in the food they eat is less than the amount being used by the body
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Give an example of what increases the amount of energy being used by the body?
Exercise
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What else is a persons health effected by?
Metabolic Rate and Cholesterol
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What is 'Metabolic Rate'?
Metabolic Rate is the rate in which all the chemical reactions in your cells occur.
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Give examples of factors that effect the metabolic rates of an individual?
Genetic Factors, gender, proportion of muscle to fat, regular exercise
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Where is Cholesterol created?
In the Liver
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Where is Cholesterol found?
In the blood.
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What does the amount of Cholesterol depend on?
Diet and Inherited factors
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Risks of having Cholesterol?
Disease of the heart and blood vessels
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What is cholesterol carried by?
Cholesterol is carried around the body by LIPOPROTEINS
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What is classed as 'Good Cholesterol'?
HDL's
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What is classed as 'Bad Cholesterol'?
LDL's
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What are the three organisms that cause diseases?
Bacteria, Fungi and viruses
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Why do Organisms produce rapidly?
Humans are warm, Moist and have sugars on the surface of our cells
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What are Pathogens?
Pathogens are microorganisms that cause infectious diseases
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What are the main pathogens?
Bacteria and Viruses
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How do pathogens enter the body?
It enters through gaps in the skin
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Once Pathogens are inside the body what do they do?
They release poisons or toxins that make us feel ill
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Give some examples of diseases that are caused by bacteria
Food poisoning, cholera, typhoid, whooping cough, gonorrhoea
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When viruses get inside the body they can only...
Reproduce inside host cells, they damage the cells while doing so.
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What happens once the host cells finally breaks open?
The viruses are then passed out into the bloodstream, the airways and other routes.
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Give some examples of diseases caused by viruses
Influenza (Flu), colds, measles, mumps, rubella, chicken pox and AIDS
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What are the Two ways the body uses to protect itself?
Passive Immunity and Active Immunity
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What is Passive immunity?
This aims at stopping it from entering in the first place, this system includes; skin, mucas, cilia, stomach acid and enzymes in tears.
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What is Active immunity?
The immunity which results from the production of antibodies by the immune system in response to the presence of an antigen.
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What Can White Blood Cells do?
Ingest Pathogens and destroy them. produce antibodies to destroy pathogens and produce antitoxins.
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Other cards in this set

Card 2

Front

What do we need for a balanced and healthy diet?

Back

Water, Carbohydrates, Fats, Proteins, Fibre and Minerals and Vitamins

Card 3

Front

What is the use of CARBOHYDRATES?

Back

Preview of the front of card 3

Card 4

Front

What is the use of FATS?

Back

Preview of the front of card 4

Card 5

Front

What is the use of PROTEIN?

Back

Preview of the front of card 5
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