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7.13B Internal Stimuli

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Term
Definition
STIMULUS   An action or condition that provokes a response.  
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RESPONSE   A change in a system resulting from a stimulus.  
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HOMEOSTASIS   The tendency of an organism or cell to maintain a balanced state so as to maintain health and function.  
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PATHOGEN   A microorganism or virus that can cause disease.  
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FEVER   The body's response to being infected by a pathogen; causes the body temperature to increase.  
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VOMITTING   The body's response to eating contaminated food.  
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HUNGER PAIN   The body's response to not getting enough calories in; not eating enough food.  
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DEHYDRATION   The body's response to not drinking enough water.  
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WILTING   A plant's response to not getting enough water.  
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STUNTED GROWTH   A plant's response to not getting enough nutrients from the soil.  
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INTERNAL STIMULI   Cues from within an animal for survival; (hunger, thirst, sleepiness).  
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STOMATA   Small openings on the underside of a leaf through which oxygen, carbon dioxide, and water can move in and out.  
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