How are involuntary actions and reflex actions different from each other?

Involuntary action

Reflex action

1.

The actions which we cannot do by thinking about them even if we wanted to. For example, beating of heart.

1.

An action i.e., response which is immediate (spontaneous) and that does not need processing by the brain is called reflex action. For example, immediate removal of hand on touching a hot plate.

2.

Involuntary actions are controlled by brain.

2.

Reflex actions are controlled by spinal cord.