Introduction to Health & Disease (2.2.2)

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What is an infectious disease?
A disease that can be passed from person to person.
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What is an endemic?
Infectious disease which is low level in the population.
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What is an epidemic?
Sudden increase in a disease in a defined area.
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What is a pandemic?
Disease spreading across the whole world.
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What does the WHO define health as?
A state of complete physical, mental and social well-being.
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What is a disease?
Anything that impairs the normal functioning of the body.
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Give 3 signs that you have good health.
Free from disease. Suitably housed with proper sanitation. Well integrated into society.
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What is a parasite?
Any organism that lives in or on another organism (the host), usually causing harm and taking nutrients.
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Give an example of an external parasite.
The human head louse.
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Give an example of an internal parasite.
Tapeworms that live in the digestive system.
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What is a pathogen?
Any organism that can cause disease, many are micro-organisms.
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Are all pathogens parasites?
Yes, but not all parasites are pathogens.
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What are the different types of pathogen?
Bacteria, fungi, protoctista and viruses.
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Why would a parasite not want to kill its host?
The parasite would also die before it had a chance to reproduce. They try to keep the host alive for as long as possible so they can gain nutrients, reproduce and spread.
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Name two features of bacteria.
No nucleus. Fast reproduction rate.
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Give an example of a disease-causing bacterium.
Mycobacterium tuberculosis.
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Name two features of protoctista.
Single celled. No nucleus.
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Give an example of a disease-causing protoctist.
Plasmodium.
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Name two features of fungi.
Thread-like hyphae. Reproduce by spores.
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Give an example of a disease-causing fungus.
Candida.
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Name two features of viruses.
Only carry out cellular processes when inside a host cell. Sometimes referred to as non-living.
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Give an example of a disease-causing virus.
HIV.
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Card 2

Front

What is an endemic?

Back

Infectious disease which is low level in the population.

Card 3

Front

What is an epidemic?

Back

Preview of the front of card 3

Card 4

Front

What is a pandemic?

Back

Preview of the front of card 4

Card 5

Front

What does the WHO define health as?

Back

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