Please ...can you explain me what is reflex action ?
Reflex action is a sudden action in response to change in environment . The response in that case needs to be quick and instant and there is no thinking involved in it . It takes place through the reflex arc. Reflex arcs are formed in spinal chord . e.g. When we touch a hot vessel , we withdraw our hands. Receptor organ ( a sense organ ) and effector organ ( a muscle or a gland ) are also participated in this action.
Have a nice day .
The automatic action or response provoked by a stimulus is known as a reflex action. The reflex actions, however, show sudden responses and do not involve any thinking. A connection of detecting the signal from the nerves (input), and responding to it immediately (output) is called a reflex arc. A reflex arc makes instant and automatic responses possible.