1. The division of the nervous system that handles the body’s after dinner activities is the Parasympathetic nervous system.
Organs that are involved in these processes include:
A. Esophagus (vagus nerve (X) and spinal nerves) - the nervous system allows the esophagus to undergo involuntary muscle actions that allows food and liquids to pass through.
B. Pancreas (vagus nerve (X), greater and lesser splanchnic nerves) - the nervous system controls the secretion of exocrine and endocrine in accordance to the conditions of the body
C. Liver (hepatic nervous plexus) - the nervous system controls and adjusts the functions of the liver (which is removing toxins and regulating blood related levels), according to physiological conditions
D. Stomach (vagus nerve (X)) - the nervous system controls the different glands to secrete different digestive enzymes, mucus, and other substances
E. Gallbladder (vagus nerve (X)) - the nervous system regulates the release of acetylcholine
F. Small Intestine and Large intestine (vagus nerve (X)) - the nervous system regulates the activities found in the intestines, for example the gastrointestinal blood flow, as well as absorption, secretion and transportation of substances.
G. Heart (vagus nerve (X)) - the nervous system regulates the muscle contractions of the heart based on physiological conditions
H. Salivary glands (facial nerve (VII), glossopharyngeal nerve (IX)) - the nervous system controls the amount of secretion and the type of saliva secreted
2. The phenomenons experienced by my friend are what we call fight or flight responses which is brought about the sympathetic nervous system. These responses occur by stimuli such as dangers, which in this case is the close crash with a bicycle our of nowhere. The sympathetic nervous system then energizes different parts of the body to respond to the event that happened, this is seen in her heart that is beating fast, her having goose bumps, as well as her head being sweaty. So in summary, when a threat or danger is detected, the fight or flight response of the sympathetic nervous system occurs.