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.
The basis for different glands secreting saliva of differing composition can be seen by examining salivary glands histologically. Two basic types of acinar epithelial cells exist: 1  serous cells, which secrete a watery fluid, essentially devoid of mucus.  mucous cells, which produce a very mucus-rich secretion.