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Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
Homeostasis
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Homeostasis

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An introduction to homeostatic biological systems. Thermoregulation and blood glucose levels are used as examples.

An introduction to homeostatic biological systems. Thermoregulation and blood glucose levels are used as examples.

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  • Transcript

    • 1. Sir Charles Blagden What are effects of extreme heat on the body? How do we resist heat? See the video
    • 2. Thermoregulation
    • 3. Thermoregulation Too hot
    • 4. Thermoregulation Too hot cc licensed flickr photo by Finizio: http://flickr.com/photos/finizio/492955038/
    • 5. Thermoregulation Too hot Too cool cc licensed flickr photo by Finizio: http://flickr.com/photos/finizio/492955038/
    • 6. Thermoregulation Too hot cc licensed flickr photo by MaryLane: http://flickr.com/photos/marylane/520905761/ Too cool cc licensed flickr photo by Finizio: http://flickr.com/photos/finizio/492955038/
    • 7. Homeostasis of house temperature cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055
    • 8. Homeostasis of house temperature cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055
    • 9. Homeostasis of house temperature Too cold cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055
    • 10. Homeostasis of house temperature Too cold cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055 cc licensed flickr photo by Xystance: http://flickr.com/photos/xystance/4278997785/
    • 11. Homeostasis of house temperature Too cold Too hot cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055 cc licensed flickr photo by Xystance: http://flickr.com/photos/xystance/4278997785/
    • 12. Homeostasis of house temperature Too cold Too hot cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055 cc licensed flickr photo by Xystance: http://flickr.com/photos/xystance/4278997785/
    • 13. Homeostasis of house temperature Too cold Too hot cc licensed flickr photo by rustybrick: http://flickr.com/photos/rustybrick/2151548025/ return temp to normal range cc licensed flickr photo by slworking2: http://flickr.com/photos/slworking/394991055 cc licensed flickr photo by Xystance: http://flickr.com/photos/xystance/4278997785/
    • 14. Thermoregulation is an example of homeostasis def’n - the property of a system that regulates its internal environment and tends to maintain a stable, constant condition despite changing external conditions
    • 15. Thermoregulation is an example of homeostasis def’n - the property of a system that regulates its internal environment and tends to maintain a stable, constant condition despite changing external conditions All living things exhibit homeostasis
    • 16. Homeostatic systems require: a receptor - monitors and responds to changes in the system a control center - sets the range for the condition an effector - produce an action which moves the system back into the desired range
    • 17. Thermoregulation cc licensed flickr photo by labguest: http://flickr.com/photos/labguest/3467278568/
    • 18. Thermoregulation
    • 19. Thermoregulation When too hot: • sweat • vasodilation (blood vessels open up so warm blood can get to surface of skin)
    • 20. Thermoregulation When too hot: • sweat • vasodilation (blood vessels open up so warm blood can get to surface of skin) When too cold: • shiver • goose bumps • vasoconstriction (blood vessels close up so heat isn’t lost through the skin) • adrenal and thyroid glands - increase overall metabolism
    • 21. Blood sugar regulation cc licensed flickr photo by EUSKALANATO: http://flickr.com/photos/ 17657816@N05/1971827663/ Receptor (hypothalmus) responds to high blood sugar level Control center (hypothalmus) Sends signal to the pancreas releases insulin cc licensed flickr photo by djneight: http://flickr.com/photos/thedjneight/4119439462/
    • 22. Effects of insulin • cells absorb more glucose (blood sugar) • liver stores glucose as glycogen • fat storage Lower blood sugar level

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