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2352906
GCSE AQA Biology 1 Homeostasis
Descrição
Mind map showing information about what needs to be controlled in the body...
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gcse
aqa
biology unit 1
homeostasis
biology
biology 1
gcse
Mapa Mental por
Lilac Potato
, atualizado more than 1 year ago
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Lilac Potato
mais de 9 anos atrás
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Resumo de Recurso
GCSE AQA Biology 1 Homeostasis
Definition: The maintenance of a constant internal environment
These things must be controlled...
Ion content
Water content
Body temperature
Blood sugar level
Ion content
Ions taken into body in food & absorbed into blood
If food contains too much - excess ions need to be removed
Some ions lost in sweat
Kidneys remove excess from blood - got rid of in urine
Water content
Taken into the body as food & drink
Lost in these ways...
Through the skin as sweat
Via the lungs in breath
Via the kidneys in urine
Balance between sweat & urine can vary...
On cold day/when you're not been exercising, don't sweat much, produce more urine which will be pale (diluted)
On hot day/when you're exercising, sweat a lot, produce less urine which will be darker(more concentrated)
Will lose more water through breath
Body temperature
In human body enzymes work best at 37 degrees C
Part of the brain is sensitive to blood temp. in the brain & receives messages from skin about skin temp.
Blood sugar level
Eating food containing carbs put glucose into blood from gut
Normal metabolism of cells removes glucose from blood, if you do vigorous exercise more is removed
Hormone (insulin) helps maintain right level so cells get constant supply of energy
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