Brain and mind

An animal’s response to a stimulus is coordinated by their central nervous system (CNS).
Responding to a stimulus

A stimulus is a change in the environment of an organism.
Animals respond to a stimulus in order to keep themselves in favourable conditions.
Examples of this include:
moving to somewhere warmer if they are too cold
moving towards food if they are hungry
moving away from danger to protect themselves
Animals that do not respond to a stimulus do not survive for long.
An animal’s response to a stimulus is coordinated by their central nervous system (CNS). The CNS consists of the brain and the spinal cord. It…