Blood cells are produced in the yellow bone marrow.

Correct Answer: B

Rationale: Blood cells are produced in red bone marrow, primarily in flat bones and epiphyses of long bones. Yellow marrow, mostly fat, does not produce blood cells in adults, making 'False' correct.

Correct Answer: A

Rationale: The sternum’s xiphoid process is its lowest part, below the manubrium and body, often cartilaginous in youth. This is correct, making 'True' the answer.

Correct Answer: A

Rationale: The patella, a sesamoid bone, is the kneecap, protecting the knee joint. This is standard terminology, making 'True' correct.

Correct Answer: B

Rationale: Dorsiflexion is ankle flexion toward the shin (e.g., toes up), not exceeding 180°. Hyperextension is beyond 180°, making 'False' correct.

Correct Answer: B

Rationale: The axial skeleton includes 80 bones (skull, vertebral column, thoracic cage) in the central body, not extremities. The appendicular has 126 bones at extremities. '100' and '126' are incorrect, making 'Consists of 80 bones which are located in the upper central part of the body' accurate.