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Questions and Answers
What is a structure that contains actin or myosin?
What is a structure that contains actin or myosin?
- Fascicle
- Filaments (correct)
- Tendon
- Myofibril
What is a myofibril?
What is a myofibril?
A long, filamentous organelle found within muscle cells that has a banded appearance.
What is the sarcolemma?
What is the sarcolemma?
The plasma membrane of the muscle cell.
What are muscle fiber cells?
What are muscle fiber cells?
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What does the endomysium do?
What does the endomysium do?
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What is the perimysium?
What is the perimysium?
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Define fascicle.
Define fascicle.
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What is the epimysium?
What is the epimysium?
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What is fascia?
What is fascia?
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What is a tendon?
What is a tendon?
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What is a sarcomere?
What is a sarcomere?
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Study Notes
Skeletal Muscle Composition
- Filaments: Structures composed of actin or myosin, essential for muscle contraction.
- Myofibril: Long organelles within muscle cells characterized by a banded appearance, contributing to muscle contraction.
- Sarcolemma: The plasma membrane that encloses a muscle cell, critical for maintaining ion balance and signal transduction.
- Muscle Fiber (Cells): Individual muscle cells that contract upon stimulation and relax after stimulation ceases.
- Endomysium: A thin layer of connective tissue that surrounds each muscle fiber, providing protection and support.
- Perimysium: Connective tissue that encases a group of muscle fibers, forming a fascicle, which aids in force distribution.
- Fascicle: A bundle of muscle fibers, functioning together to transmit force.
- Epimysium: A thick connective tissue sheath that surrounds the entire muscle, protecting and shaping it.
- Fascia: A network of fibrous connective tissue that separates muscles from one another while holding them in place; covers the muscle with the epimysium.
- Tendon: A fibrous cord that extends from fascia beyond the muscle and connects it to bone, facilitating movement.
- Sarcomere: The smallest functional unit of muscle tissue, extending from one Z line to another, crucial for muscle contraction.
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