Which part of the tibia is known as 'ankle bone'?

Correct Answer: C

Rationale: The medial malleolus, the tibia's distal medial projection, is known as the 'ankle bone,' forming the inner ankle bulge, articulating with the talus for stability. Tibial tuberosity is a proximal knee landmark. Anterior crest is the shin's ridge. Fibular notch connects to the fibula, not the ankle joint. The medial malleolus's prominence and ankle role, per lower leg anatomy, make 'c' correct.

Correct Answer: C

Rationale: Cartilage has a gel-like matrix, a firm, flexible ground substance of chondroitin sulfate and water, supporting structures like the ear or joints without rigidity of bone. Bone has a hard, calcified matrix. Blood is fluid (plasma), not gel-like. Adipose stores fat, with minimal matrix. Cartilage's semi-solid, resilient matrix, distinct from other connective tissues' properties, makes 'c' the correct answer.

Correct Answer: A

Rationale: First-degree burns affect only the epidermis, causing redness and pain (e.g., sunburn), without deeper damage. Second-degree reaches the dermis, blistering. Third-degree destroys both layers, numbing nerves. Fourth-degree extends to muscle/bone, rare. Epidermal-only involvement, per burn classification, makes 'a' correct.

Correct Answer: B

Rationale: A compound (open) fracture breaks through the skin, exposing bone, risking infection (e.g., tibia piercing). Simple stays internal. Stress is microdamage from overuse. Greenstick bends, common in kids. Compound's external breach, per trauma classification, makes 'b' correct.

Correct Answer: D

Rationale: Ribs (1-12) include true (1-7, direct sternal attachment) and false (8-12, indirect or none), forming the cage. Sternum connects ribs, thoracic vertebrae anchor them, costal cartilage links true ribs none encompass both types. Ribs' classification, per thorax, makes 'd' correct.