Which energy source lasts less than a day and is consumed in greater quantities during stress?

Which energy source lasts less than a day and is consumed in greater quantities during stress?

• A. Glucose
• B. Fructose
• C. Starch
• D. Glycogen

Answer: (A)

Energy stored as glycogen is a rapid-release source that is used up within a day and increases under stress. Glycogen is the storage form of glucose in liver and muscle, organized so it can be broken down quickly into glucose when the body needs energy fast. During stress, hormones like adrenaline trigger glycogenolysis, releasing glucose to meet heightened energy demands. Because glycogen stores are limited, they typically last less than a day if you’re not replenishing them, which fits the description. Glucose itself is the active energy molecule, not a storage form, so it isn’t described as lasting less than a day. Starch is a plant storage form and isn’t a direct energy source for humans, and fructose is processed differently and isn’t the immediate short-term energy reserve during stress.

Energy stored as glycogen is a rapid-release source that is used up within a day and increases under stress. Glycogen is the storage form of glucose in liver and muscle, organized so it can be broken down quickly into glucose when the body needs energy fast. During stress, hormones like adrenaline trigger glycogenolysis, releasing glucose to meet heightened energy demands. Because glycogen stores are limited, they typically last less than a day if you’re not replenishing them, which fits the description. Glucose itself is the active energy molecule, not a storage form, so it isn’t described as lasting less than a day. Starch is a plant storage form and isn’t a direct energy source for humans, and fructose is processed differently and isn’t the immediate short-term energy reserve during stress.