What is the only bone in the body that does not articulate with another bone?

Correct Answer: B

Rationale: The hyoid bone, in the neck, is unique as it does not articulate with any bone, suspended by ligaments. The patella, phalanges, and occipital all articulate, making 'hyoid' correct.

Correct Answer: D

Rationale: The humerus head articulates with the glenoid cavity of the scapula, forming the shoulder joint. The femur is thigh, radius is forearm, and os coxa is hip, making 'scapula' correct.

Correct Answer: A

Rationale: The femur, the longest bone, forms the thigh, from hip to knee. The humerus is arm, tibia is shin, and ulna is forearm, making 'femur' correct.

Correct Answer: D

Rationale: A synarthrosis is an immovable joint (e.g., skull sutures). Diarthrosis is freely movable, amphiarthrosis is slightly movable, and osteoarthrosis is a condition, making 'synarthrosis' correct.

Correct Answer: A

Rationale: The knee and elbow are hinge joints, allowing flexion/extension in one plane. Ball-and-socket is multi-directional, saddle is thumb-specific, and gliding is sliding, making 'hinge' correct.