Question

What is reflex action. Illustrate with examples.

Answer 1

A reflex, or reflex action, is an involuntary and nearly instantaneous movement in response to a stimulus.

A Few Examples of Reflex Action. When light acts as a stimulus, the pupil of the eye changes in size.

Answer 2

When you touch a hot object or when a pin pricks your finger, what is your immediate reaction? Of course, you remove your hand away from the source of pain, either the hot object or the pin. In situations like these, your reactions are always immediate, involuntary and sudden. They happen without much of a thinking process. In scientific terms, this action is called the reflex action. Here the spinal cord has a major role to play.  The reflex arc shows the pathway through which the reflex action occurs.