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Questions and Answers
What is the function of endomysium in muscle tissue?
What is the function of endomysium in muscle tissue?
- To contain blood vessels, nerves, and lymphatics (correct)
- To give attachment between muscle bundles
- To give the attachment of muscle to tendon and ligament
- To separate muscle fibers
Which type of muscle fibers are under the control of the will?
Which type of muscle fibers are under the control of the will?
- Smooth muscle fibers
- Striated muscle fibers (correct)
- Cardiac muscle fibers
- Non-striated muscle fibers
Where are all skeletal muscles attached in the body?
Where are all skeletal muscles attached in the body?
- To the organs
- To the bones (correct)
- To the skin
- To the blood vessels
Which part of the muscle is surrounded by endomysium?
Which part of the muscle is surrounded by endomysium?
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What distinguishes skeletal muscle fibers from smooth muscle fibers?
What distinguishes skeletal muscle fibers from smooth muscle fibers?
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Which muscle fiber type is found in the upper third of the esophagus?
Which muscle fiber type is found in the upper third of the esophagus?
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Study Notes
Muscle Tissue Characteristics
- Formed of a group of muscle fibers with contractility power due to contractile organoids (myofibrils) in their cytoplasm
- Cell membrane is called the sarcolemma
- Cytoplasm is called the sarcoplasm
Types of Muscle Fibers
- Skeletal muscle fibers
- Cardiac muscle fibers
- Smooth muscle fibers
Skeletal Muscle Fibers
- Characteristics: striated (show transverse dark and light bands) and voluntary (under control of will)
- Exceptions: upper third of esophagus, pharynx, and cremaster muscle are involuntary
- Do not branch, except in tongue and face
- Sites: all skeletal muscles attached to skeleton, eye, tongue, pharynx, and larynx
Structure of Skeletal Muscle Fibers
- Formed of cells (fibers) and connective tissue
- Connective tissue:
- Epimysium: dense connective tissue surrounding the whole muscle
- Perimysium: dense connective tissue dividing the muscle into bundles
- Endomysium: loose connective tissue separating the muscle fibers
- Function of connective tissue:
- Endomysium: contains blood vessels, nerves, and lymphatics
- Perimysium: provides attachment between muscle bundles
- Epimysium: provides attachment of muscle to tendon, ligament, perichondrium, and periosteum
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