Thermoregulation

Three ways you body can lose heat

• Evaporation of sweat

• Warm air exhaled out

• Hairs becoming erect

• Vasodilation

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What happens to the rate of an enzyme reaction when heated up?

• Increases

• Decreases

• Increase and then decreases

• decreases and then increases

Which progress produces heat in every living cell?

• digestion

• respiration

• protein synthesis

• photosynthesis

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How is heat transferred around the body?

• Blood

• Water

• Sweat

• Skin

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Why is the bodies core temperature 37^oC?

• Optimum temperature for enzymes

• No specific reason

• To limit the enzymes rate of reaction

• Its not 37^oC

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Vasodilation means

• blood vessels allow more blood to flow through them

• blood vessels allow less blood to flow through them

• blood vessels swell up

• there is a blood clot

What does the hypothalamus do? 

• Makes humans shiver
• Regulates "automatic" functions like temperature and thirst
• Responsible for regrowth of skin
• Responsible to make us sweat when needed

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How do the muscles affect regulation of body temperature? 

• Errector pili muscles make hair stand up
• Shivering increases heat
• Muscles do not help regulate body temperature 
• Shivering decreases heat 

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What do blood vessels do to help with thermoregulation ? 

• Dilate to make the blood vessels smaller  so blood can flow faster 
• Constrict to make the blood vessels smaller  so blood can stay close to core

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Why do blood vessels dilate? 

• To keep the blood close to heart 
• So the heat can be transported to the skin for evaporation

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