After the danger passes, the parasympathetic division of the ANS takes over.
Restores us to a calmer state.
Reverses changes mage by the sympathetic system.
Responds more slowly than sympathetic – can take 20 – 30 min to calm down.
Major Functions of the ANS Body Organ Sympathetic Division Parasympathetic Division Pupil of the eye Heart Stomach Intestines Adrenal gland Blood vessels in the skin Bladder Dilates Rapid, accelerates Inhibits activity Inactive Secretes adrenalin and noradrenaline Constricts Relaxes Constricts Slows Stimulates activity Active No intervention Dilate Contracts
Schematic diagram of the NS Nervous System (NS) Central NS Peripheral NS Brain Spinal Cord Somatic NS (Voluntary) Autonomic NS (Involuntary) Sympathetic NS (Arousing) Parasympathetic NS (Calming)