The mode of action in beating of the heart different from reflex actions:
Beating of heart Reflex actions
Involuntary actions are the actions which are not controlled by our will. Reflex actions are the sudden action in response to something
They do not need any kind of stimulus to work. They required stimulus for its action.
These actions are regulated by the brain. These actions are regulated by the spinal cord.
They do not involve skeletal muscle. They do involve skeletal muscle.
These actions are performed throughout one's life. These actions are produced in response to an event of an emergency.
This action may be quick or slow. Reflex actions are always quick
