When a person begins exercising,the first metabolic fuel used is:
A)ATP and creatine phosphate.
B)fatty acids.
C)glucose.
D)stored glycogen.

Question

Quizplus · Accepted Answer

When a person begins exercising, immediate energy is needed, and the body uses stored ATP (adenosine triphosphate) and creatine phosphate. These compounds provide energy for the first few seconds of exercise. Glucose and stored glycogen are also used for energy, but they take longer to produce ATP, so they are not the first metabolic fuel used. Fatty acids are used during prolonged exercise or when the body has depleted its glycogen stores.

When a Person Begins Exercising,the First Metabolic Fuel Used Is