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Communication & Homeostasis Basics
Responding to their Environment Helps Organisms Survive
1) Animals increase their chances of survival by responding to changes in their
external environment e.g. avoiding harmful environments ­ too hot/cold places.
2) And respond to changes in their internal environment to make sure that
conditions are always…

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enzyme's active site is changed and it no longer works as a catalyst. This
means metabolic reactions are less efficient.
If body temperature is too low, enzyme activity is reduced, slowing the rate
of metabolic reactions.
The highest rate of enzyme activity happens at their optimum temperature
(about 37°C in…

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