Why does it benefit you that some reflexes occur without involving neurons in the brain?

So that you have instincts that can help u if u r in the wiled

This is called involuntary muscles. this makes it easier for us because he don't have to constantly make our heart beat or remember to breathe. our body naturally does it. otherwise we would die at birth.

Animals will lose energy because it is converted to heat

It would be 23 beats per second