What condition does glucagon primarily help to regulate?

Glucagon primarily helps to regulate blood sugar levels. It is a hormone produced by the alpha cells of the pancreas, and its main function is to raise blood glucose levels when they fall below normal. When blood sugar levels drop, glucagon is released into the bloodstream, promoting the conversion of glycogen stored in the liver into glucose, which is then released into the bloodstream. This process is crucial for maintaining energy levels and ensuring the body has a steady supply of sugar, particularly between meals or during periods of fasting.

In contrast, other options pertain to different regulatory mechanisms in the body. Blood pressure is managed through various hormones and neural signals, cholesterol levels are influenced by dietary intake and lipid metabolism, and body temperature is regulated by thermoregulation mechanisms that involve various physiological processes. Hence, glucagon's specific role is focused on the metabolism of carbohydrates, particularly in relation to maintaining stable blood sugar levels.