Final answer:
The characteristics of muscle fibers are matched to their types: Fast-twitch glycolytic fibers are large and fatigue quickly; fast-twitch oxidative-glycolytic have some myoglobin and use mixed metabolism; slow-twitch oxidative fibers have the most blood vessels and mitochondria, and are known as red muscle.
Step-by-step explanation:
Matching the characteristics with the appropriate types of muscle fibers:
- a. Fast-twitch glycolytic fibers (1) have the largest diameter.
- b. Fast-twitch glycolytic fibers (1) use anaerobic metabolism, thus fatigue quickly.
- c. Slow-twitch oxidative fibers (3) have the most blood vessels.
- d. Fast-twitch oxidative-glycolytic fibers (2) have some myoglobin.
- e. Fast-twitch glycolytic fibers (1) are used for quick, fine movements.
- f. Slow-twitch oxidative fibers (3) are also called red muscle.
- g. Fast-twitch oxidative-glycolytic fibers (2) use a combination of oxidative and glycolytic metabolism.
- h. Slow-twitch oxidative fibers (3) have the most mitochondria.
Fast-twitch glycolytic fibers are designed for quick, powerful movements and fatigue rapidly due to their reliance on anaerobic metabolism. The fast-twitch oxidative-glycolytic fibers combine characteristics of both oxidative and glycolytic systems, allowing for both quick actions and a higher resistance to fatigue than purely glycolytic fibers. Slow-twitch oxidative fibers are equipped for endurance, with numerous mitochondria and a high myoglobin content, which gives these muscles their red color and supports sustained aerobic activity.