Biology Topic 3

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What is a drug?
A substance which has a physiological effect when introduced into the body
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How do painkillers affect the body?
They interfere with the messages to side track the pain
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How do hallucinogens affect the body?
They alter a persons perception, mood and other mental processes
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How do stimulants affect the body?
They enhance the effects of chemicals on the brain
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How do depressants affect the body?
Thy produce a drowsy and calming effect
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What is the addictive drug in cigarettes?
Nicotine
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How does carbon monoxide affect the blood?
Prevents the effective carrying of oxygen
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Give 3 short term effects of alcohol abuse
-Poor memory -Blurred vision -Slowed reaction times
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Give 2 long term effects of alcohol abuse
-Heart disease -Increased blood pressure
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What causes infectious diseases?
Pathogenic microorganisms
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Which pathogen is spread in water?
Cholera
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Which pathogen is spread by body fluids?
HIV
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Which pathogen is spread through the air?
Influenza
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Name 2 animal vectors
Anophelus mosquito and housefly
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Name 3 physical barriers
Skin, Cilia and Mucus
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Name 2 chemical defences in the body
Hydrochloric acid in the stomach and lysozymes in tears
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Why do plants produce chemicals that antibacterial effects?
To defend themselves
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Which bacteria could have arisen from the misuse of antibiotics?
MRSA
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What does independence mean?
The dynamic relationship between all living things
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What limits the length of a food chain?
The transfer of energy to less useful forms at each tropic level
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Other cards in this set

Card 2

Front

How do painkillers affect the body?

Back

They interfere with the messages to side track the pain

Card 3

Front

How do hallucinogens affect the body?

Back

Preview of the front of card 3

Card 4

Front

How do stimulants affect the body?

Back

Preview of the front of card 4

Card 5

Front

How do depressants affect the body?

Back

Preview of the front of card 5
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