Causes of disease

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  • Created by: Jenna k
  • Created on: 07-04-14 07:52
Name three pathogens.
Virus, Bateria and Fungi
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What are the charactoristics of a pathogen?
They must gain entery to the host, conisies resit intervention form the host and damage the host.
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How do pathogens get into our bodies?
The pathogen pentitrates any of the organisms interfaces with the environment. They inculde the gase-exchange system and the digestion system.
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How are our gas exchange systems protected form pathogens entering it?
Goblet cells and cillia line the trachea. The goblet cells produce mucus that covers the pathogen and the cillia move it up to the epiglotis to be swallowed.
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How does the digestive system protect us form pathogens?
In the stomach there is a very high acidic content which kills microoganisms. Enzymes are also produced that brake down proteins on the pathogens.
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How do pathogens cause disease?
They can either damage the host tissues or produce toxins.
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How does a pathogen cause tissue damage?
They can inhibit the synthesis of RNA and DNA and proteins of the host. Alternativey thay can also prvent tissues form functioning.
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How does a pathogens toxin cause damage to us? (Cholera)
In the case of Cholera the toxin casue chloride ions to move out of the cell and water moves with it by osmosis, causeing dehydration and diahrear.
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Looking at data critacally is a skill you have to have. So state the procedure of working on a graph question.
Read the stem. Read the axis. Read the scales. And read all the lines on the graph. Like a wather lady discribe what is happeneing in the graph and decide where you have seen such a graph.
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What is a correlation?
A correlation occures when the indepnedant variable changes and this infilcts a change on the dependant variable.
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What is a Causal realtionship
A causal realtaionship is when the independant variable directy changes the dependant variable. There is a cause and effect.
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What the limitations of a correleation?
It may show a realtion but not a causal realtionship.
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What can affect human health, other than pathogens?
Lifestyle.
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What is a risk?
A measure of the proability that damage to health will occure as a result of a given hazard.
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What is a risk measured in?
Per centage
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What does Misleading statistics mean?
That without context there is no meaning to data, which can stimulate correlations to be assumed to be worse that they actually are.
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What are the risk factors of cancer?
Smoking, diet, obesity, physcal avtivity and sunlight
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How can you reduce the risk of cancer?
Eat a balanced diet, get a lot of exercise and don't smoke or drink excessivly
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What are the lifestyle factors?
Smoking, diet, obesity, physcal avtivity and sunlight
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What are the lifestyle factors of Coronary Heart Disease?
Smoking, hypertention, high colesterol levels, obesisty, diet and lack of exercise.
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How can we reduce the risk of Coronary Heart Disease?
We need to eat beter, so our chlesterol levels reduce and we loose weight and get more of the minerals we need. We need to do more exercise, which will reduce hypertention and increase the strength of your heart.
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Other cards in this set

Card 2

Front

What are the charactoristics of a pathogen?

Back

They must gain entery to the host, conisies resit intervention form the host and damage the host.

Card 3

Front

How do pathogens get into our bodies?

Back

Preview of the front of card 3

Card 4

Front

How are our gas exchange systems protected form pathogens entering it?

Back

Preview of the front of card 4

Card 5

Front

How does the digestive system protect us form pathogens?

Back

Preview of the front of card 5
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