Question

long bundles of contractile proteins found in the sarcoplasm are called

need help? review these concept resources.

rate your confidence to submit your answer. high medium low

reading

© 2025 mcgraw hill. all rights reserved.

Explanation:

In muscle - related biology, long bundles of contractile proteins in the sarcoplasm are well - known structures. These are called myofibrils. They are the basic contractile units of muscle fibers and are composed of actin and myosin filaments.

Answer:

Myofibrils