Question
Which one of the following secretes glucagon?
Beta () cells of islets of Langerhans
Alpha () cells of islets of Langerhans
Acidophilic cells of adenohypophysis
Basophilic cells of adenohypophysis
Solution
B.
Alpha () cells of islets of Langerhans
The islets of Langerhans are the regions of the pancreas that contain its endocrine cells. Hormones produced in the islets of Langerhans are secreted directly into the blood flow by five types of cells, mentioned as follows.
Alpha cells secrete glucagon.
Beta cells secrete insulin and amylin delta cells secrete somatosatin.
Gamma cells secrete pancreatic polypeptide and epsilon cells secrete ghrelin.
