Asked by oumou terra on Sep 23, 2024
Verified
Which of the following is NOT true of a myofibril?
A) Thin myofilaments consist of actin, troponin, and tropomyosin.
B) Elastic filaments are composed of titin.
C) Thick myofilaments consist of myosin.
D) Myofibrils are composed of muscle fibers.
E) All of these are true of myofibrils.
Myofibril
Basic rod-like unit of a muscle cell that is responsible for muscle contraction.
Myofilaments
The filaments of myofibrils, constructed from proteins, primarily actin and myosin, which are essential for muscle contraction.
Actin
A protein that plays a vital role in muscle contraction and cell movement.
- Gain insight into the configuration and functionality of various muscle organelles and the sarcomere.
Verified Answer
HB
Hannah Brown1 day ago
Final Answer :
D
Explanation :
Myofibrils are not composed of muscle fibers. Rather, they are structures within muscle fibers that are responsible for muscle contraction.
Learning Objectives
- Gain insight into the configuration and functionality of various muscle organelles and the sarcomere.
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