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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)
Give two examples of mechanism that homeostasis controls
temperature, pH, glucose, Hormones, salts, water, oxygen, carbon dioxide, etc
True or False: Homeostasis means that conditions never change (static conditions)
FALSE
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: Ectotherms
animals whose regulation of body temperature depends on external sources, such as sunlight or a heated rock surface.
Give 3 examples of ectotherms
amphibians, and most fish and invertebrates
ectotherms are also known by the name
cold blooded animals
endotherms are also known by the name
warm blooded animals
Give 2 examples of endotherms
Birds and mammals
Define: Endotherms
organisms that produce most of their heat by metabolic reactions
Define feedback
Feedback is defined as the information gained about a reaction to a product, which will allow the modification of the product.
Why are the feedback loops important?
Feedback loops are important because they allow living organisms to maintain homeostasis.
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.
2 examples of POSITIVE FEEDBACK
Fruit Ripening, childbirth, blood clotting
