Q51. What is the main role of the skeletal system?
A) To produce hormones
B) To regulate temperature
C) To support and protect the body
D) To control growth
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Correct Answer: C) To support and protect the body
Explanation: The primary role of the skeletal system is to provide support for the body and protect vital organs such as the brain, heart, and lungs.
Q52. Which bones are part of the appendicular skeleton?
A) Skull and vertebrae
B) Ribs and sternum
C) Pelvis and limb bones
D) None of the above
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Correct Answer: C) Pelvis and limb bones
Explanation: The appendicular skeleton includes bones of the limbs (arms and legs) and the girdles (pelvic and shoulder) that connect them to the axial skeleton
Q53. What is the function of the bone marrow?
A) To provide structural support
B) To facilitate joint movement
C) To produce blood cells
D) To store minerals
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Correct Answer: C) To produce blood cells
Explanation: Bone marrow is a soft tissue inside bones that produces blood cells, including red blood cells, white blood cells, and platelets
Q54. Which type of bone tissue is dense and provides strength?
A) Spongy bone
B) Compact bone
C) Marrow
D) Periosteum
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Correct Answer: B) Compact bone
Explanation: Compact bone is dense and provides strength and structure. It forms the outer layer of all bones and is particularly prominent in the shafts of long bones
Q55. What is the primary mineral component of bone?
A) Iron
B) Magnesium
C) Calcium
D) Zinc
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Correct Answer: C) Calcium
Explanation: Calcium is the primary mineral component of bone, providing structural strength and playing a critical role in all areas of bone health
Q56. Which joint type is primarily found in the elbow and knee?
A) Ball and socket
B) Hinge
C) Pivot
D) Gliding
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Correct Answer: B) Hinge
Explanation: Hinge joints, like those in the elbow and knee, allow movement primarily in one direction, much like the opening and closing of a door
Q57. What is the role of ligaments in the skeletal system?
A) To attach muscles to bones
B) To connect bones at joints
C) To produce red blood cells
D) To cushion and support weight
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Correct Answer: B) To connect bones at joints
Explanation: Ligaments are tough bands of fibrous tissue that connect bones to other bones at joints, providing stability and support
Q58. Which condition is marked by a decrease in bone density and an increased risk of fractures?
A) Arthritis
B) Osteoporosis
C) Bursitis
D) Tendonitis
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Correct Answer: B) Osteoporosis
Explanation: Osteoporosis is a condition characterized by a decrease in bone density, leading to fragile bones and an increased risk of fractures, particularly in the hip, wrist, and spine