Which of the following is NOT true of a myofibril?

A. Thin myofilaments consist of actin, troponin, and tropomyosin.
B. Thick myofilaments consist of myosin.
C. Elastic filaments are composed of titin.
D. Myofibrils are composed of muscle fibers.
E. All of these are true of myofibrils.


Answer: D

Anatomy & Physiology

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