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Questions and Answers
What structures unite to form tendons at the extremities of muscles?
What structures unite to form tendons at the extremities of muscles?
- Fibrous connective tissue of the endomysium, perimysium, and epimysium (correct)
- Cartilage and ligaments
- Muscle fibers only
- Synovial membrane sheaths
Which structure facilitates smooth, frictionless movement of tendons passing through bony tunnels?
Which structure facilitates smooth, frictionless movement of tendons passing through bony tunnels?
- Bursa
- Periosteum
- Aponeurosis
- Tendon sheaths (correct)
Where is the belly of the biceps muscle located?
Where is the belly of the biceps muscle located?
- Along the shaft of the humerus (correct)
- Attached to the radius
- Over the elbow joint
- Attached to the scapula
Which type of tendon is flat and broad?
Which type of tendon is flat and broad?
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Which structure helps relieve pressure when a muscle or tendon moves over a bony prominence?
Which structure helps relieve pressure when a muscle or tendon moves over a bony prominence?
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Where are bursa usually found?
Where are bursa usually found?
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What occurs when a muscle contracts?
What occurs when a muscle contracts?
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What stabilizes a bone when another bone is pulled toward it during muscle contraction?
What stabilizes a bone when another bone is pulled toward it during muscle contraction?
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Study Notes
Attachment of Muscles
- Muscles attach to bones, cartilage, or ligaments through fibrous connective tissue tendons, which vary in length from 0.5cm to 35cm
- Tendons unite the endomysium, perimysium, and epimysium at the muscle extremities
- Aponeurosis is a broad, flat tendon
- Tendons may pass under ligamentous bands or through bony tunnels, encased in synovial membrane sheaths for smooth movement
- Synovial sacs called bursae relieve pressure where muscles or tendons contact bony prominences or skin moves over bone
Action of Muscles
- The belly of a muscle lies along a bone shaft, never over a joint
- Muscles are firmly attached to different bones at each end through tendons that cross a joint
- Muscle contraction exerts a pull on both bones, but one bone is stabilized by isometric contractions of other muscles, causing the other bone to move towards it
- A muscle's belly lies parallel to a bone shaft, with tendons attached to different bones, enabling movement
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