Question

The function of glucagon hormone is:
A. To increase glycogenesis
B. To decrease blood sugar level
C. To release glucose from liver cells and glycogenolysis promotion
D. To increase the absorption of glucose and fatty acids through cells

Answer 1

Hint: Glucagon is a peptide hormone released by the endocrine pancreatic cells

Complete answer:
When there is a lack of food, the level of glucose in the blood decreases, the pancreatic cells secrete a hormone called glucagon. Glycogen works by instructing the liver cells to catabolize stored glycogen and increase the production of glucose via gluconeogenesis, the synthesis of glucose from non-carbohydrate compounds. As a result, the blood glucose level goes higher.

Additional Information:
Proteins are responsible for carrying and receiving signals from cell to cell inside the body. Many of them reside on the cell’s membrane to interact with neighbouring cells. When the sugar levels in the blood are lower than normal, a small peptide known as glucagon will bind to receptor proteins on your liver cells, triggering enzymes inside to release sugar into your bloodstream.
Insulin is a hormone that is secreted by cells in the pancreas when blood glucose levels are too high. It travels through the bloodstream and binds to receptors on cells throughout the body. In response, cells that have insulin receptors increase their rate of glucose uptake and processing. Specifically, insulin stimulates cells in the liver and skeletal muscle to import glucose from the blood and synthesize glycogen from glucose monomers. As a result, glucose levels in the blood decline.
Insulin and glucagon have an interaction amongst themselves which is a negative feedback system that achieves homeostasis with respect to glucose concentrations in the blood.

So, the correct answer is ‘to release glucose from liver cells and glycogenolysis promotion’.

Note:
The pancreatic cells are both endocrine and exocrine in nature. It is therefore known as a mixed gland.
The endocrine cells release the hormone insulin and glucagon.
The exocrine cells of the pancreas release the pancreatic or digestive juices.