Name two types of moving joints:

Correct Answer: A

Rationale: Joints are classified by movement: immovable (e.g., skull sutures), slightly movable (e.g., vertebrae), and freely movable (synovial). Hinge joints (e.g., elbow) allow bending in one plane, and ball-and-socket joints (e.g., shoulder) permit multi-directional movement—both are correct per the document. Fixed joints don’t move, cartilage joints are slightly movable, and tendon joints aren’t a category, making 'hinge joints' a correct choice (noting ball-and-socket is also valid).

Correct Answer: A

Rationale: An articulation is the point where two bones meet, forming a joint (e.g., knee). The diaphysis and epiphysis are parts of long bones, and the endosteum lines the marrow cavity, making 'articulation' the correct term.

Correct Answer: D

Rationale: Osteoclasts, which break down bone, derive from monocytes (white blood cells) in the bone marrow. Osteoprogenitor cells are stem cells, osteoblasts form bone, and osteocytes maintain it, making 'osteoclasts' the correct answer.

Correct Answer: A

Rationale: Bone fracture repair occurs in four stages: 1) hematoma (blood clot) forms at the break, 2) fibrocartilage callus bridges the gap, 3) bony callus replaces it with spongy bone, 4) remodeling shapes it into compact bone. 'hematoma, fibrocartilage callus, bony callus, remodeling' is correct.

Correct Answer: A

Rationale: Cranial bones form the cranium: frontal, parietal, occipital, temporal, sphenoid, and ethmoid. The ethmoid is cranial, while nasal, vomer, and zygomatic are facial bones, making 'ethmoid' correct.