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402 Homeostasis

TermDefinition
Homeostasis - stable internal conditions
Stimulus - A change in an organism's surroundings that causes the organism to react Plural: stimuli
Receptor - a structure that detects a stimulus
Control center - A structure that decides if a stimulus must be responded to If it decides there needs to be a response, it instructs the effectors to respond
Effectors - carries out a response In negative feedback, this response brings conditions back to the set point In positive feedback, this response pushes conditions further from the set point
Negative feedback loop - a response that reverses a change Ex: an increase in blood sugar is a stimulus that produces a response that reduces blood sugar Most homeostatic feedback loops are negative
Positive feedback loop - a response that increases a change Ex: when platelets begin to clot, they release chemicals that tell other platelets to begin to clot
Created by: Mr. Ford
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