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DAILY FREE MCQ CHALLENGE for Pre-Medical Entrance Preparation
Question
Which of the following statements regarding glucagon is false?
A. It is secreted by α-cells of langerhans
B. It decreases blood sugar level
C. The gland responsible for its secretion is heterocrine gland
D. It acts antagonistically to insulin
NOTEImportant Question from
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See Answer Here
B. It decreases blood sugar level
See Explanation Here
The two main types of cells in the Islet of Langerhans are called α-cells and β-cells. The α-cells secrete a hormone called glucagon, while the β-cells secrete insulin.
Glucagon is a peptide hormone, and plays an important role in maintaining the normal blood glucose levels. Glucagon acts mainly on the liver cells (hepatocytes) and stimulates glycogenolysis resulting in an increased blood sugar (hyperglycemia). In addition, this hormone stimulates the process of gluconeogenesis which also contributes to hyperglycemia. Glucagon reduces the cellular glucose uptake and utilisation. Thus, glucagon is a hyperglycemic hormone.
References
NCERT Biology Text, Class: XI, Unit V: Human physiology, Chapter 22: Chemical coordination and integration, Page no: 336.
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