A reflex is an automatic response to a stimulus. Humans use reflex actions in only some of their behaviour, for example controlling the eye's pupil size.

Simple reflexes

Simple reflexes produce rapid involuntary responses to a stimulus. This ensures that an animal responds in the way most likely to result in its survival.

Examples include:

• moving towards and finding food
• moving away and sheltering from predators
• moving towards and finding a mate

Simple animals use reflex actions for the majority of their behaviour. The disadvantage to using reflex actions most of the time is…