I. An increased brain stimulation controls digestion and relaxation of the autonomic nervous system's parasympathetic division, which enables the rest-and-digest mechanism and is responsible for the body’s after-dinner activities. When an event has passed, it works to relax the person and maintain their body's natural functions, which reduces arousal.
1. Organ: Salivary Glands
Major Nerve Supply: Facial (VII) nerves and Glossopharyngeal (IX) nerves
Effects of the nervous system on its functions: increased secretion of saliva
2. Organ: Lungs
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: increased contraction leading to airway constriction
3. Organ: Heart
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: decreased heart rate and force of atrial
contraction
4. Organ: Liver
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: increased bile secretion and Glycogen synthesis
5. Organ: Gallbladder
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: increased contractions which release bile into
small intestine
6. Organ: Stomach
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: increased activity, motility, and gastric and intestinal tone
7. Organ: Pancreas
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: increased secretion of digestive enzymes and the
hormone insulin
8. Organ: Intestines (Small and Large)
Major Nerve Supply: Vagus (X) nerve
Effects of the nervous system on its functions: improved digestion, nutrient handling, gastric acid secretion
9: Organ: Urinary bladder
Major Nerve Supply: Pelvic Parasympathetic Nerves
Effects of the nervous system on its functions: increased contraction of muscular wall and relaxation of
internal urethral sphincter
10. Organ: Rectum
Major Nerve Supply: Pelvic Parasympathetic Nerves
Effects of the nervous system on its functions: enables defecation mechanism
II. This shocking event may have activated the fight-or-flight response of the sympathetic nervous system in my friend. Most of the prominent effects of elevated sympathetic activity comprise an increasing heart rate, constant sweating, and contraction of the arrector pili muscles, which induces goosebumps. The secretion of epinephrine and norepinephrine from the adrenal medullae can amplify and lengthen the reactions.