When the platelets bind to a clot, they release serotonin, where it serves as a vasoconstrictor and helps to regulate hemostasis and blood clotting. Serotonin also is a growth factor for some types of cells, which may give it a role in wound healing.erotonin's presence in insect venoms and plant spines serves to cause pain, which is a side-effect of serotonin injection. Serotonin is produced by pathogenic amoebae, and its effect on the gut causes diarrhea.
The salivary glands are made up of a number of different types of cells. The type of cancer you have is named after the type of cell the cancer started in. This means that your doctor will tell you which salivary gland your cancer started in â the parotid, submandibular, sublingual or minor salivary glands.
Salivary Glands. Salivary glands produce saliva, which moistens the mouth to help a person chew and swallow food. Saliva also contains substances (enzymes) that begin the breakdown of food. There are four pairs of salivary glands: 1  The parotid glands are located between the ear and the jaw. The submandibular glands are located under the jaw. 2  The sublingual glands are located on the floor of the mouth under the tongue. 3  The buccal glands are not shown in this picture. 4  They are located in the mucous membrane lining the cheeks and mouth. 5  These glands produce only a small amount of saliva.