Describe the role of glucagon in gluconeogenesis - AQA - A-Level Biology - Question 5 - 2019 - Paper 1

Glucagon plays a crucial role in gluconeogenesis by promoting the conversion of non-carbohydrate substrates, such as glycerol and amino acids, into glucose within the liver. When blood glucose levels drop, glucagon is released by the pancreas, signaling the liver to increase glucose production and release into the bloodstream, thereby raising blood glucose levels. This action helps to maintain homeostasis, ensuring that the body has a continuous supply of glucose, especially during fasting or intense exercise.