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. For example – shutting eyes immediately when bright light is focused on them.
Following is the table which is a quick summary of difference between involuntary action and reflex action:
|Involuntary actions||Reflex actions|
|Involuntary actions takes place without the conscious choice of an organism.||Reflex actions are those actions takes place along with stimuli.|
|These actions are controlled by the medulla oblongata or the mid brain.||These actions are controlled by spinal cord.|
|The speed is relatively slower.||The speed is very quick.|
|Example is beating of heart.||Example is blinking of eyes.|