Question

a bundle of muscle fibers is known as a__________.
multiple choice
motor unit
myofibril
fascicle
myofilament
sarcomere

Explanation:

• A motor unit consists of a motor neuron and the muscle fibers it innervates.
• A myofibril is a component within a muscle fiber, made up of myofilaments.
• A fascicle is specifically defined as a bundle of muscle fibers.
• Myofilaments (actin and myosin) are the contractile proteins within myofibrils.
• A sarcomere is the basic contractile unit of a myofibril.

Answer:

fascicle