The process of bones increasing in thickness is known as:
Appositional growth
Concentric growth
Interstitial growth
Circumferential growth
Epiphyseal plate closure
The Correct Answer is A
Choice A reason: Appositional growth is the correct answer. It refers to the process by which bones increase in diameter or thickness. This occurs when osteoblasts in the periosteum lay down new bone matrix on the outer surface, while osteoclasts resorb bone on the inner surface to maintain proper proportions.
Choice B reason: Concentric growth is not a recognized term in bone physiology. It may refer to circular layering in osteons but not to bone thickening.
Choice C reason: Interstitial growth occurs within cartilage and is responsible for lengthening during development. It does not contribute to bone thickness.
Choice D reason: Circumferential growth is a vague term and not commonly used in bone biology. It may imply growth around the circumference but is not the standard term for bone thickening.
Choice E reason: Epiphyseal plate closure marks the end of longitudinal bone growth during adolescence. It does not relate to increasing bone thickness.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A reason: The central canal, also known as the Haversian canal, is located at the center of each osteon in compact bone. It contains blood vessels and nerve fibers that supply nutrients and signals to the bone cells.
Choice B reason: Adipose tissue is found in yellow marrow, primarily in the medullary cavity of long bones, not in the central canal of osteons.
Choice C reason: Yellow marrow and spicules are found in the medullary cavity and spongy bone, respectively. They are not components of the central canal.
Choice D reason: Cartilage is not present in the central canal. Interstitial lamellae are layers of bone matrix found between osteons, not within the canal.
Choice E reason: Red marrow is found in spongy bone and certain flat bones, not in the central canal. While nerves are present, the absence of blood vessels in this choice makes it incomplete.
Correct Answer is D
Explanation
Choice A reason: The medullary cavity is found in the diaphysis of long bones and contains bone marrow. It is not a feature of spongy bone.
Choice B reason: Lamellar bone refers to mature bone with organized collagen fibers. While spongy bone can be lamellar, this does not define its structural organization.
Choice C reason: Osteons, or Haversian systems, are cylindrical structures found in compact bone, not spongy bone.
Choice D reason: Trabeculae are the defining structural units of spongy bone. They are lattice-like networks of bone tissue that provide strength while minimizing weight and house bone marrow between their spaces.
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