A fixed action pattern
is a behavior that is carried out to completion once started, regardless of
changes in the original stimulus and the sequence is unchangeable. The
unlearned behavior of fixed action patterns are triggered by a type of external
stimulus that start off a particular organism.
Maintaining internal conditions within an organism, especially when <span>outside conditions change is called homeostasis. In Latin, the word homo/homeo means <em>the same, </em>and stasis means <em>state/condition. </em> </span>
