Final answer:
Glucagon increases blood glucose levels through processes like glycogenolysis, gluconeogenesis, and lipolysis. The action that is NOT an effect of glucagon is promoting glucose storage (option d) ; this is the role of insulin. Glucagon acts to mobilize energy, while insulin assists in storing it.
Step-by-step explanation:
The hormone glucagon has several effects on metabolism, predominantly designed to increase blood glucose levels when they are low. Glucagon stimulates the liver to convert glycogen into glucose, a process called glycogenolysis, and it also prompts gluconeogenesis, where glucose is produced from amino acids and glycerol. Additionally, glucagon induces lipolysis, which breaks down stored fats into fatty acids that can be used as energy or converted into glucose.
With these points in mind, the action that is NOT an effect of glucagon is promoting glucose storage. Instead, insulin is the hormone responsible for promoting glucose storage by facilitating the uptake of glucose into cells and stimulating glycogenesis, the opposite of glycogenolysis. Therefore, glucagon is a catabolic hormone that mobilizes energy stores, while insulin is an anabolic hormone that aids in storing energy.