Multiple Choice
Which part of the rib articulates with the bodies of the thoracic vertebrae?
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8. Joints
Introduction to Joints
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Which structure is an example of a hinge joint?
A
Shoulder
B
Atlantoaxial joint
C
Elbow
D
Hip
Verified step by step guidance1
Step 1: Understand the concept of a hinge joint. A hinge joint is a type of synovial joint that allows movement primarily in one plane, similar to the motion of a door hinge. It permits flexion and extension.
Step 2: Review the anatomical structures listed in the problem. The shoulder and hip are ball-and-socket joints, which allow movement in multiple planes, including rotation. The atlantoaxial joint is a pivot joint, allowing rotational movement.
Step 3: Focus on the elbow joint. The elbow is a classic example of a hinge joint, as it allows flexion and extension of the forearm relative to the upper arm.
Step 4: Compare the elbow joint's movement to the definition of a hinge joint. Confirm that the elbow fits the criteria of a hinge joint because its movement is restricted to one plane.
Step 5: Conclude that the elbow is the correct answer based on its anatomical structure and function as a hinge joint.
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