Free Human Skeleton MCQs with Answers

31. Regular moderate exercise helps a patient with arthritis mainly because it

• A. cures the disease completely
• B. keeps the joints mobile and strengthens the muscles around them
• C. regrows the worn away cartilage
• D. dissolves calcium out of the bones

Explanation: Movement nourishes cartilage, prevents stiffness and builds supporting muscle, which unloads the joint. Exercise cannot restore lost cartilage, so its benefit is protection and function, not cure.

32. To reduce the frequency of gout attacks, a patient is usually advised to

• A. eat more organ meats
• B. avoid drinking water
• C. limit purine rich foods and alcohol
• D. stop all physical activity

Explanation: Purines from red meat and organ meats break down to uric acid, the substance that crystallises in the joints during gout, and alcohol raises its production too. Cutting these lowers urate levels and prevents flares.

33. In severe arthritis a badly damaged joint can be surgically replaced with

• A. a graft of tendon
• B. a long course of antibiotics
• C. physiotherapy alone
• D. an artificial prosthesis of metal and plastic

Explanation: Joint replacement, most often of the hip or knee, fits metal and plastic surfaces where cartilage has vanished, relieving pain and restoring movement. Antibiotics treat infection, not mechanical wear.

34. Bone is composed of

• A. Only collagen
• B. Only calcium phosphate
• C. Collagen and calcium phosphate
• D. Cartilage only

Explanation: Bone contains organic collagen (flexibility) and inorganic calcium phosphate/hydroxyapatite (hardness).

35. Osteoblasts are

• A. Bone-destroying cells
• B. Bone-forming cells
• C. Mature bone cells
• D. Fat cells in bone

Explanation: Osteoblasts are bone-forming cells that secrete collagen and matrix, later becoming osteocytes.