Question

Islets of Langerhans:

A) Comprise 10-20% of pancreatic mass and secrete all glucose counter-regulatory hormones

B) Are the endocrine component of the pancreas, secreting insulin and glucagon

C) Are discrete insulin-secreting glands found only on the surface of the pancreas

Answer 1

The Islets of Langerhans, found in the pancreas, consist of alpha and beta cells which secrete glucagon and insulin respectively to regulate blood glucose levels.

Step-by-step explanation:

The Islets of Langerhans are the endocrine component of the pancreas and comprise a small percentage of the pancreatic mass. These clusters are composed of four types of cells, with alpha cells producing glucagon and beta cells producing insulin, among others. These hormones are integral to the regulation of blood glucose levels. Insulin is secreted when blood glucose levels rise, whereas glucagon is secreted when blood glucose levels fall. Together, these hormones work to maintain glucose homeostasis in the body.