Question

What is a refex action?????????

Answer 1

Hey there !

Reflex action is an involuntary and nearly instantaneous movement in response to a stimulus. A reflex is made possible by neural pathways called reflex arcs which can act on an impulse before that impulse reaches the brain.

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Answer 2

Hey Mate

Here is your answer

A reflex action or reflex is a biological control system linking stimulus to response and mediated by a reflex arc. It is any action performed involuntarily in consequence of an impulse or impression transmitted along afferent nerves to a nerve center, from which it is reflected to an efferent nerve, and so calls into action certain muscles, organs, or cells. Reflexes can be built-in or learned. For example, a person stepping on a sharp object would initiate the reflex action through the creation of a stimulus, within specialized sense receptors located in the skin tissue of the foot. The resulting stimulus would be transmitted through afferent, or sensory neurons to the spinal cord. This stimulus is usually processed by an interneuron to create an immediate response to pain by initiating a motor response, which is acted upon by muscles of the leg, retracting the foot away from the object. This retraction would occur as the pain sensation is arriving in the brain, which would process a more cognitive evaluation of the situation.

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