In addition to adequate intake of vitamin D and calcium, walking and weight training will increase bone strength and decrease the risk of osteoporosis.

Correct Answer: A

Rationale: Vitamin D and calcium build bone, while weight-bearing exercises (walking, weight training) stimulate osteoblasts, increasing strength and reducing osteoporosis risk. This is well-supported, making 'True' correct.

Correct Answer: B

Rationale: The ilium is the largest coxal bone region, forming the upper pelvis. The ischium is smaller, supporting sitting, making 'False' correct.

Correct Answer: A

Rationale: Synovial joints (e.g., knee) have a cavity with synovial fluid, reducing friction and enabling free movement. This is accurate, making 'True' correct.

Correct Answer: D

Rationale: The appendicular skeleton has 126 bones (upper/lower limbs, pectoral/pelvic girdles) at the body’s extremities. The axial skeleton has 80 bones centrally. '100' and '80 at extremities' are incorrect, making 'Consists of 126 bones which are located at the extremities of the body' accurate.

Correct Answer: D

Rationale: The shape function defines the body’s form (e.g., height, width), varying with growth. A is support, B is blood production, and C is protection, making 'The skeleton gives the body shape, which changes with growth and makes you tall or short' the shape function.