B3 3.5 Controlling body temperature

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what temp must the human body be kept at?
37 degrees
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why must it be kept at that temp
because the enzymes work efficiently
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where is blood temp monitored
the thermoregulatory center in the brain
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how is skin temp monitored
skin receptors send impulses to the brain
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why does skin look red when we are hot
due to increased blood flow
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how does sweating help cool the body?
through evaporative cooling
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what must we do when it is hot?
drink more as when it is hot more water is lost from th skin so more water must be consumed to balance the loss
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what happens if the core temperature rises
blood vessels near the surface of the skin dilate allowing more blood to flow through the skin capillaries. energy is transferred ny radiation and the skin cools
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what else happens if the core temp rises?
sweat glands produce more sweat. its water evaporates from the skins surface. the energy required for the water to evaporate comes from the skins surface so we cool down
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what happens if the core temp falls?
blood vessels near the surface of the skin constrict and less blood flows through the skin capillaries. less energy is radiated.
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what else happnes if the core temp falls?
we shiver. muscles contract quickly. this requires respiration and some of the energy warms the blood
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Other cards in this set

Card 2

Front

why must it be kept at that temp

Back

because the enzymes work efficiently

Card 3

Front

where is blood temp monitored

Back

Preview of the front of card 3

Card 4

Front

how is skin temp monitored

Back

Preview of the front of card 4

Card 5

Front

why does skin look red when we are hot

Back

Preview of the front of card 5
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