NANP Board Practice Exam

What is the function of glucagon in carbohydrate metabolism?

1. Increases cellular glucose uptake

2. Lowers blood glucose levels

3. Increases blood glucose levels

4. Suppresses glucose production in the liver

The correct answer is: Increases blood glucose levels

Glucagon plays a crucial role in carbohydrate metabolism by increasing blood glucose levels. It is a hormone produced by the alpha cells of the pancreas, primarily acting when blood glucose levels are low. When the body requires more glucose, glucagon stimulates the liver to convert stored glycogen into glucose, which is then released into the bloodstream. This process is vital for maintaining energy levels, especially between meals or during periods of fasting. The other functions presented in the choices do not align with glucagon's role. For instance, increasing cellular glucose uptake is typically associated with insulin, not glucagon. Similarly, lowering blood glucose levels or suppressing glucose production in the liver contradicts glucagon's primary function. In summary, glucagon is essential for raising blood glucose levels during times when the body needs energy, making the selected answer accurate.