Describe the role of glucagon in gluconeogenesis - AQA - A-Level Biology - Question 5 - 2019 - Paper 2

Glucagon plays a critical role in gluconeogenesis, which is the process of generating glucose from non-carbohydrate sources. When blood glucose levels drop, glucagon is secreted by the alpha cells of the pancreas. It binds to specific receptors on target liver cells, activating enzymes that stimulate the conversion of glycerol, amino acids, and fatty acids into glucose. This ensures that the body has a supply of glucose available during fasting or low-carbohydrate intake.