Homeostasis

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  • Created by: Bek
  • Created on: 28-04-14 10:37
Who devised the term Homeostasis?
Walter Cannon
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What is negative feedback?
physiological response in the opposite direction to the detected change
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What is anticipation?
Predict change before it occurs to turn off a response before overshoot
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What is acclimatisation?
Adaptation that alters negative feedback gradually
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What is positive feedback?
Mechanism to create a rapid change from a set point in the same direction of change
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What is enantiostasis?
Maintaining homeostasis by changing a physiological variable to compensate for change in another
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How does the Blue Crab compensate for low salt?
increases internal ammonia levels
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What are conformers?
internal state matches external environment
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What are regulators?
maintaining constant internal state
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What are avoiders?
maintaining internal state by avoiding external change
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Put these in the correct order?
Cell, Tissue, Organ, Organ System, Organism
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What does extracellular fluid contain?
O2, Nutrients, H2O, Wastes, By-Products
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What is intrinsic regulation?
Fast, local response from one tissue type or organ
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What is extrinsic regulation?
Slow response through the whole body via interactions between organ systems
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What is the difference between control systems and maintenance systems?
Control systems regulate indirectly, maintenance systems regulate directly
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What is the advantage of homeostasis?
Allows some animals to exploit wider ranges of environment
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Other cards in this set

Card 2

Front

What is negative feedback?

Back

physiological response in the opposite direction to the detected change

Card 3

Front

What is anticipation?

Back

Preview of the front of card 3

Card 4

Front

What is acclimatisation?

Back

Preview of the front of card 4

Card 5

Front

What is positive feedback?

Back

Preview of the front of card 5
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