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12 Cards in this Set
- Front
- Back
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Homeostasis |
It involves balancing body functions to maintain a 'constant internal environment' |
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Why is it important that your body needs to be kept steady? |
Because its really important so that all the metabollic reactions vital for keeping you alive can continue at an appropriate rate. It can be dangerous for your health if conditions vary too much from normal levels. |
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To maintain a constant internal environment your body needs to? |
Respond to both internal and external changes whilst balancing inputs (stuff going in your body) with outputs (stuff leaving) |
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Blood glucose (sugar) concentration |
You need to make sure the amount of glucose in your blood dosen't get too high or too low |
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Water content - |
You need to keep a balance between the water you gain (in drink food and from respiration) and the water you pee, sweat and breathe out |
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Body temprature - |
You need to make sure it dosen't get too high or too low |
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Body temprature is controllee by the? |
Hypothalamus |
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All enzymes work better in your body at? |
37°C |
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The hypothalamus in your brain acts as your own.. |
Body thermostat |
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It contains receptors that are sensitive to |
Blood temprature in the brain |
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It also recieves impulse from receptors in the |
Skin (nerve endings) that provide information about the external temprature |
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When the hypothalamus detecs a change... |
It causes a response in the dermis (deep layer of the skin) |
