Answer :
Reflex action are rapid and happen spontaneously without thinking . It differs from the normal functions of the brain as brain need sometime to react to anything but reflex are so fast they do not even think
Answer:
Involuntary action is the set of muscle movement which do not require thinking. But it is controlled by brain for example beating of heart beat. While on the other hand, the reflex action is rapid and spontaneous action in response to any stimulus which doesn't involve brain.