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Multiple Choice
Which type of skeletal muscle contains abundant quantities of glycogen?
A
slow oxidative fibers
B
slow glycolytic fibers
C
fast oxidative fibers
D
fast glycolytic fibers
Verified step by step guidance
1
Understand the different types of skeletal muscle fibers: slow oxidative fibers, fast oxidative fibers, and fast glycolytic fibers. Each type has distinct characteristics based on their energy metabolism and contraction speed.
Slow oxidative fibers are designed for endurance and continuous contraction over long periods. They primarily use aerobic respiration and have high myoglobin content but low glycogen stores.
Fast oxidative fibers are intermediate in function, capable of both aerobic and anaerobic metabolism. They have moderate glycogen stores and are used for activities that require both endurance and speed.
Fast glycolytic fibers are adapted for short bursts of power and speed. They rely heavily on anaerobic glycolysis for energy, which requires abundant glycogen stores to quickly generate ATP without oxygen.
Conclude that fast glycolytic fibers contain abundant quantities of glycogen, as they need a rapid energy source for quick, intense activities.