In the structure of a skeletal muscle, a bundle of muscle fibers is known as a(n):

• A. Fascicle
• B. Sarcomere
• C. Tendon
• D. Myofibril

Answer: (A)

Verified step by step guidance

1. Understand the hierarchical structure of skeletal muscle, which is organized from the largest to smallest components: the whole muscle, bundles of muscle fibers, individual muscle fibers (cells), myofibrils within the fibers, and sarcomeres within the myofibrils.
2. Identify that a 'bundle of muscle fibers' refers to a grouping of individual muscle cells wrapped together by connective tissue.
3. Recall the terminology: a single muscle fiber is a muscle cell, a myofibril is a contractile element inside the muscle fiber, and a sarcomere is the functional unit of contraction within a myofibril.
4. Recognize that the connective tissue surrounding a bundle of muscle fibers is called the perimysium, and this bundle itself is called a fascicle.
5. Conclude that the correct term for a bundle of muscle fibers is 'fascicle', distinguishing it from sarcomere, tendon, and myofibril.