Multiple Choice
What is found in the A-bands of sarcomeres?
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9. Muscle Tissue
Sliding Filament Theory and the Sarcomere
Multiple Choice
In the context of the sliding filament theory, what is the shape of a myosin filament?
A
A long rod with globular heads
B
A flat sheet
C
A double helix
D
A spherical ball
Verified step by step guidance1
Understand the sliding filament theory: This theory explains how muscles contract by the sliding of actin and myosin filaments past each other, leading to muscle shortening.
Identify the structure of myosin: Myosin is a protein that plays a crucial role in muscle contraction. It is composed of a long rod-like tail and two globular heads.
Visualize the myosin filament: The myosin filament is structured as a long rod with globular heads that protrude from the rod. These heads are essential for binding to actin filaments during muscle contraction.
Compare the options: Evaluate the given options based on the structure of myosin. A long rod with globular heads accurately describes the myosin filament, while the other options do not match its structure.
Conclude the correct shape: Based on the sliding filament theory and the structure of myosin, the correct shape of a myosin filament is a long rod with globular heads.
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