Asked by Kluaymaii Kattaleeya on May 21, 2024
Verified
Which of these gives the correct order from large to small?
A) muscle → muscle fiber→ myofibril → sarcomeres → myofilaments
B) muscle → muscle fibers → sarcomeres → myofilaments → myofibrils
C) muscle → sarcomeres → myofibrils → actin filaments → myosin filaments
D) muscle fiber→ myofibrils → myofilaments → sarcomeres
E) muscle → myofibrils → sarcomeres → muscle fibers → myofilaments
Myofibril
Specific muscle cell organelle containing a linear arrangement of sarcomeres, which shorten to produce muscle contraction.
Sarcomeres
The basic contractile unit of muscle fiber, consisting of actin and myosin filaments between two Z-lines.
Myofilaments
Protein filaments consisting of actin and myosin that are the primary components of muscle contraction.
- Describe the structural organization and hierarchical levels of muscle anatomy, from the largest to the smallest components.
Verified Answer
PK
preethi k2607May 23, 2024
Final Answer :
A
Explanation :
The correct order from large to small in muscle structure is: muscle (the whole muscle), muscle fiber (individual muscle cells), myofibril (bundles of myofilaments within the muscle fiber), sarcomeres (segments of myofibril), and myofilaments (actin and myosin filaments within the sarcomere).
Learning Objectives
- Describe the structural organization and hierarchical levels of muscle anatomy, from the largest to the smallest components.