Question

how does body differentiate between vollentary and involentary actions

Answer 1

hii..

hope it helps you. ☺

Answer 2

hey

here is yr answer

Voluntary actions : You yourself control these actions.
Example: Someone slaps you hard.

Involuntary actions : The brain signals control these actions.
Example: Someone slaps you hard, you turn pink/red/blue/green. This is an involuntary reaction. 

hope it helps..