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14 cards from this deck
Maintenance of constant internal environment in body
37°C
Enzymes denature - shape changes, can't catalyse reactions
Sweat evaporates, removing heat from body surface
Muscles contract rapidly to generate heat
Blood vessels widen to increase heat loss when hot
Blood vessels narrow to reduce heat loss when cold
Thermoregulatory centre - monitors & controls body temp
Sweat glands, blood vessels, nerve endings
Control of water levels & mineral ions in blood
Water moves in by osmosis, cells swell & may burst
Water moves out by osmosis, cells shrink & dehydrate
Filter blood, adjust water & ion reabsorption
Controls water reabsorption in kidneys
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