The place where two bones meet is called a ______

Correct Answer: A

Rationale: A joint, or articulation, is the anatomical location where two bones connect, allowing for stability or movement (e.g., knee, shoulder). Tendons connect muscles to bones, ligaments connect bones to other bones, and muscles move bones but aren’t the meeting point, making 'joint' the correct answer.

Correct Answer: D

Rationale: Compact bone is organized into cylinder-shaped units called osteons (or Haversian systems—both terms are synonymous), containing lamellae and a central canal. Trabeculae are in spongy bone, not compact, so 'Both A and C are correct' reflects the interchangeable terminology.

Correct Answer: B

Rationale: Yellow bone marrow, found in the medullary cavity of adult long bones, is primarily fat tissue (adipose), serving as an energy reserve. Cartilage is at joints, and red/white blood cells are in red marrow, making 'fat tissue' correct.

Correct Answer: A

Rationale: Endochondral ossification follows: 1) bone collar forms around the cartilage model, 2) primary ossification center forms in the diaphysis, 3) secondary centers form in the epiphyses, 4) epiphyseal plate ossifies, closing growth. Thus, '1-2-3-4' is the correct order.

Correct Answer: A

Rationale: Fontanels are soft, membranous gaps between fetal cranial bones, allowing skull flexibility during birth and growth (e.g., anterior fontanel). Foramina are holes, sinuses are cavities, and sutures are adult joints, making 'fontanels' correct.