Questions and Answers
What is a characteristic of irregular bones?
Which of the following bones are classified as irregular?
What is a common feature of the scapulae and other irregular bones?
Which of the following is NOT an example of an irregular bone?
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Why are the scapulae considered irregular bones?
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Study Notes
Muscles
- A synergist muscle can cross several joints before reaching the joint where its main action takes place, acting as a prime mover.
Smooth Muscle
- Consists of long, spindle-shaped cells arranged in bundles or sheets.
Joints
- Fibrous joints have articulating surfaces of bones joined by fibrous tissue, allowing very little movement.
- Example of fibrous joints: The sutures of the vault of the skull.
Bone Structure
- Bone exists in two forms: compact (cortical) and cancellous (spongy).
- Compact bone appears as a solid mass.
- Cancellous bone consists of a branching network of trabeculae.
- The scapulae, although irregular, are included in the compact bone group.
Bone Classification
- Irregular bones include those not assigned to other groups, such as: • Bones of the skull • Vertebrae • Pelvic bones
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Description
This quiz explores the concept of synergist muscles, which cross multiple joints before reaching their primary action point. Understand the role of synergist muscles in the human body.
