Question

The endocrine functions of the pancreas are accomplished by groups of alpha and beta cells that compose the islets of Langerhans. Alpha cells secrete:

A) insulin
B) both insulin and glucagon
C) glucagon
D) trypsinogen and chymotrypsinogen

Answer 1

Alpha cells in the pancreas secrete glucagon which increases blood glucose levels by converting glycogen to glucose in the liver.

Step-by-step explanation:

The endocrine functions of the pancreas are performed by groups of cells known as the islets of Langerhans. Within these islets, alpha cells secrete glucagon, a hormone that increases blood glucose levels by triggering the liver to convert glycogen into glucose, which is then released into the bloodstream. Another type of cells, beta cells, produce the hormone insulin, which has the opposite effect of lowering blood glucose levels by facilitating the intake of glucose into the body's cells.

Therefore, the correct answer to the student's question, 'Alpha cells secrete:', is C) glucagon.