B3 3.1: Controlling internal conditions.

All information was taken directly from the AQA revision guide with only the key points from B3 3.1.

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What is homeostasis?
Keeping internal conditions controlled within a narrow range.
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What must be controlled?
Temperature, blood glucose, water and ion content and levels of waste product.
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What are the waste products that have to be removed?
Carbon Dioxide and Urea.
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How is Carbon dioxide produced and removed?
Produced = Repiration and Removed = via the lungs when we breathe out.
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How is Urea produced and removed?
Produced = In the liver from breakdown of amino acids Removed = kidneys by urine temporarily stored in bladder.
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How to water and miner ions enter our body?
When we eat and drink.
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What happens if the water or ion content is wrong?
Too much water could move in or out of the cells and damage/destroy them.
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Other cards in this set

Card 2

Front

What must be controlled?

Back

Temperature, blood glucose, water and ion content and levels of waste product.

Card 3

Front

What are the waste products that have to be removed?

Back

Preview of the front of card 3

Card 4

Front

How is Carbon dioxide produced and removed?

Back

Preview of the front of card 4

Card 5

Front

How is Urea produced and removed?

Back

Preview of the front of card 5
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