Homeostasis

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  • Created by: Lina
  • Created on: 06-04-14 15:36
What is vasodilation?
Nerves stimulate arterioles that supply the capillaries to dilate-> more blood flows through the skin capillaries-> excess heat from the blood is lost by radiation
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Increased sweating to help you cool down
Nerve impulses stimulate sweat glands in your skin to release sweat. The water in the sweat evaporates-> cooling effect on the skin
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2 ways in which a thermoregulatory centre monitors your blood t
1) Contains receptors that are sensitive to the t of the blood flowing through it 2) Receives impulses from the skin, giving info about skin t
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What is vasoconstriction?
The arterioles that supply skin capillaries constrict-> less blood flows into skin capillaries-> less heat is lost by radiation
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Why would you lose your fingers if you were too cold?
Cells at extremities would die due to reduced blood supply- less oxygen+ glucose reaches them
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Other cards in this set

Card 2

Front

Increased sweating to help you cool down

Back

Nerve impulses stimulate sweat glands in your skin to release sweat. The water in the sweat evaporates-> cooling effect on the skin

Card 3

Front

2 ways in which a thermoregulatory centre monitors your blood t

Back

Preview of the front of card 3

Card 4

Front

What is vasoconstriction?

Back

Preview of the front of card 4

Card 5

Front

Why would you lose your fingers if you were too cold?

Back

Preview of the front of card 5

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