<unk> s are endocrine cells in the islets of Langerhans of the pancreas. They make up 15-20% of the cells in the islets. They are responsible for synthesizing and secreting the peptide hormone glucagon, which elevates the glucose levels in the blood. In rodents<unk> s are located in the periphery of the islets, in humans the islet arcitechture is generally less organized and<unk> s are frequently observed inside the islets as well. In the electron microscope<unk> s can be identified by their characteristic granules with a large dense core and a small white halo.
Alternative and more common spelling:<unk>  or α-cell.
Alpha cell
Beta cell
Granule cell
Interneuron
Cone cell
Ganglion cell
Chromaffin cell
Spindle neuron