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External Environment monitored, organism changes
behaviour/physiology to reduce stress.
Env. change = stimulus. Organism change =
Slow change = gradual response. Quick change = rapid
Internal Environment tissue fluid in animals.
Toxic/unwanted substance buildup in TF cells alter own env.
CO2 changes pH, acts as stimulus, cells respond by reducing
activity negative effect.
Waste/toxins enter blood from TF excreted.
Blood conc.…read more