This is governed by the parasympathetic nervous system.

To help return balance, the parasympathetic system needs to be strengthened.

The parasympathetic system is active during periods of rest and sends signals to your heart to decrease its rate.

When a person is sleeping, the parasympathetic system releases other chemicals.

But after 24 hours, the parasympathetic nervous system took over as hopelessness set in.

This is due to the fact that the dilated heart is no longer under control of the parasympathetic nervous system.

The sympathetic system speeds up the heart, the parasympathetic system slows it down.

Bronchoconstriction is due to an activation of parasympathetic nervous system.

Some typical actions of the sympathetic and parasympathetic systems are listed below.

After the stressor is gone, the parasympathetic system kicks in.