Final answer:
Skeletal muscle cells use carbohydrates, specifically glucose stored as glycogen, as the primary fuel source during burst muscle work due to their quick and efficient conversion to ATP. Fatty acids derived from storage lipids are not used as the primary fuel source during burst muscle work due to their slower conversion to ATP.
Step-by-step explanation:
Skeletal muscle cells use carbohydrates, specifically glucose stored as glycogen, to fuel energy metabolism during burst muscle work because carbohydrates can be quickly and efficiently broken down to produce ATP. Glucose is readily available and can be rapidly broken down through glycolysis to generate ATP, which is needed for muscle contraction during intense exercise. In contrast, fatty acids derived from storage lipids are not used as the primary fuel source during burst muscle work because they require more oxygen and time to be broken down to produce ATP. Fatty acids are mainly utilized during low to moderate intensity exercise when oxygen is more readily available.