What are the two types of reflex actions?

Reflex actions are automatic or involuntary movement of
living organisms provoked by a sensory stimulus. For example, will if a person
accidentally touches a very hot object, he or she will jerk away without thinking about
what action to take. Reflex actions aer of two types - unconditioned reflexes and
conditioned reflexes. The unconditioned reflex are the reflexes that are part of the
basic bodily functions which are not dependent on individuals past experiences with a
particular type of stimulus. For example the pupil of our eyes automatically expand in
darkness and contract in light.

Conditioned reflexes, in
contrast are reflexes, which an individual learns from previous experiences with similar
stimulus. These reflexes work by individuals learning to associated the stimulus with
something else. For example, a dog may begin to salivate with smell of food because the
dog has learnt to associate the smell with the food.