Beginning in the early 20th century, Congress has usually, but not always, stipulated that an amendment must be ratified by the required number of states within seven years from the date of its submission to the states in order to become part of the Constitution.
The autonomic system controls the respiratory, circulatory, digestive, urogenital systems, and the action of the glands and hormone production.   The autonomic nervous systâ¦em consist of two divisions known as the sympathetic nervous system and the parasympathetic nervous system.
In 1902, William Bayliss and Ernest Starling were studying how the nervous system controls the process of digestion. It was known that the pancreas secreted digestive juices in response to the passage of food (chyme) through the pyloric sphincter into the duodenum.They discovered (by cutting all the nerves to the pancreas in their experimental animals) that this process was not, in fact, governed by the nervous system.ecretin is produced in the S cells of the duodenum, which are located in the intestinal glands. In humans, the secretin peptide is encoded by the SCT gene. Secretin was the first hormone to be identified.