Answer 1 of 6: Ihave read many postings about the weather in Roatan and there is sometimes conflicting info but overall it seems to be that -March can sometimes still be rainy(it looks like it is at the end of the rainy season) -April has very little rain Am...
* D cells produce somatostatin; and. * F or D1 cells produce pancreatic polypeptide. These hormones are all polypeptides. Insulin is secreted only by the B cells whereas the other hormones are also secreted by the gastrointestinal mucosa and somatostatin is also found in the brain.
1 Hormones produced in the islets of Langerhans are secreted directly into the blood flow by at least five different types of cells. 2  The hormones produced in the islets of Langerhans area of the pancreas are insulin, glucagon, and somatostatin.  Pancreatic hormones are secreted by alpha, beta, delta, PP and epsilon cells.