Study

Homeostasis

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  • Define: Ectotherms
    animals whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface.
  • Give 2 examples of endotherms
    Birds and mammals
  • Define: Endotherms
    organisms that produce most of their heat by metabolic reactions
  • True or False: Homeostasis means that conditions never change (static conditions)
    FALSE
  • Give two examples of mechanism that homeostasis controls
    temperature, pH, glucose, Hormones, salts, water, oxygen, carbon dioxide, etc
  • Give 3 examples of ectotherms
    amphibians, and most fish and invertebrates
  • Define feedback
    Feedback is defined as the information gained about a reaction to a product, which will allow the modification of the product.
  • Define: POSITIVE FEEDBACK
    A positive feedback loop occurs in nature when the product of a reaction leads to an increase in that reaction.
  • Define: NEGATIVE FEEDBACK
    A negative feedback loop occurs in biology when the product of a reaction leads to a decrease in that reaction.
  • Define: Homeostasis
    homeostasis is describe as the ability of an organism to maintain its internal environment (within the narrow limits that allow optimal cell functioning)
  • Why are the feedback loops important?
    Feedback loops are important because they allow living organisms to maintain homeostasis.
  • ectotherms are also known by the name
    cold blooded animals
  • 2 examples of NEGATIVE FEEDBACK
    Temperature regulation, blood pressure, osmoregulation
  • endotherms are also known by the name
    warm blooded animals
  • 2 examples of POSITIVE FEEDBACK
    Fruit Ripening, childbirth, blood clotting
  • Define: POSITIVE FEEDBACK
    A positive feedback loop occurs in nature when the product of a reaction leads to an increase in that reaction.
  • What happens to the cells and enzymes if the homeostasis is not maintained?
    emzymes can be disrupted by an environment that is too salty, too acidic, too basic, or too hot.
  • Define: Enzyme
    a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
  • Define: Homeostasis
    homeostasis is describe as the ability of an organism to maintain its internal environment (within the narrow limits that allow optimal cell functioning)
  • 2 examples of NEGATIVE FEEDBACK
    Temperature regulation, blood pressure, osmoregulation