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Questions and Answers
What is a characteristic of irregular bones?
What is a characteristic of irregular bones?
- They do not fit into other bone categories. (correct)
- They are always smaller in size.
- They have a regular shape.
- They are only found in the upper body.
Which of the following bones are classified as irregular?
Which of the following bones are classified as irregular?
- The pelvis (correct)
- The femur
- The carpals
- The phalanges
What is a common feature of the scapulae and other irregular bones?
What is a common feature of the scapulae and other irregular bones?
- They do not have a regular shape. (correct)
- They are always found in pairs.
- They are always flat.
- They are always connected to other bones.
Which of the following is NOT an example of an irregular bone?
Which of the following is NOT an example of an irregular bone?
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Why are the scapulae considered irregular bones?
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.
