Practice Questions on the Skeletal System
Page 1

  1. Which of the following cell types is responsible for synthesizing the organic component of cartilage matrix?
    1. Chondrocytes
    2. Osteoblasts
    3. Osteocytes
    4. Chondroclasts
    5. 2 of the above

  2. Which of the following hormones acts to stimulate osteoclast activity and thus increase bone resorption?
    1. Growth Hormone
    2. Parathyroid Hormone
    3. Calcitonin
    4. Insulin
    5. Creatinine

  3. Which of the following statements about bone is TRUE?
    1. Bone is the hardest tissue in the body
    2. Bone is a dynamic tissue which changes in response to hormonal demands
    3. Bone has an organic component of hydroxyapatite
    4. Bone contains 95% of the body's calcium in the form of hydroxyapatite crystals

  4. Which of the following is NOT a characteristic of bone tissue?
    1. Periosteum
    2. Calcium phosphate crystals
    3. Lacunae that contain 2-4 cells each
    4. None of the above

  5. The matrix of hyaline cartilage consists of all of the following EXCEPT:
    1. Collagen fibers
    2. Chondrocytes
    3. Proteoglycans
    4. Lacunae
    5. Perichondrium

  6. The organic component of bone matrix is produced by:
    1. Chondrocytes
    2. Chondroblasts
    3. Osteoblasts
    4. Osteocytes
    5. Osteoclasts

  7. Which of the following statements about osteoblasts is TRUE?
    1. Osteoblasts are quiescent, inactive bone cells
    2. Osteoblasts secrete osteoid, which contains only the inorganic component of bone matrix
    3. Osteoblasts respond to parathyroid hormone
    4. Osteoblasts maintain contact with each other via cytoplasmic processes known as canaliculi

  8. Which of the following cells is primarily responsible for bone resorption?
    1. Osteoblast
    2. Osteocyte
    3. Osteoclast
    4. Chondrocyte
    5. Chondroblast

  9. Which of the following cell types extend cytoplasmic processes through canaliculi?
    1. Osteoclasts
    2. Osteocytes
    3. Osteoblasts
    4. Endothelial cells
    5. Fibroblasts

  10. Which of the following is absent in fibrocartilage?
    1. Matrix
    2. Chondrocytes
    3. Collagenous fibers
    4. Lacunae
    5. Perichondrium

  11. Removal of the organic component of bone matrix makes the bone...
    1. Lose its shape
    2. Stretchable but not flexible
    3. Flexible but not stretchable
    4. Smaller
    5. More fragile and more readily breakable

  12. Which of the following can be found in cartilage but not bone tissue?
    1. Lacunae
    2. Protein fibers
    3. Blood vessels
    4. Chondroitin

  13. These cells are located in bone tissue:
    1. Chondroblasts
    2. Osteocytes
    3. Fibroblasts
    4. Chondrocytes
    5. More than one of the above

  14. The dense connective tissue covering the outer surface of bone diaphyses is known as the:
    1. Perichondrium
    2. Periosteum
    3. Endosteum
    4. Epiosteum
    5. Exofibrium

  15. Which of the following bones is considered a sesamoid bone?
    1. Clavicle
    2. Humerus
    3. Patella
    4. Femur
    5. Popliteal

  16. These 2 components of bone are responsible for its hardness and pliability.
    1. Osteoclasts and collagen
    2. Mineralized salts and osteocytes
    3. Mineralized salts and collagen
    4. Collagen and elastin
    5. Collagen and metastatin

  17. A fracture in the shaft of a long bone would be a break in the:
    1. Epiphysis
    2. Metaphysis
    3. Diaphysis
    4. Arthrosis
    5. Atalaphysis

  18. Yellow marrow consists of ______________ tissue.
  19. Chondroblasts produce ____________________.
  20. _____________ carry blood vessels along the long axis of a bone.
    1. Volkmann's canals
    2. Canaliculi
    3. Lacunae
    4. Foramina
    5. Haversian canals

  21. The cell type that maintains the previously formed bone matrix is the:
    1. Osteoclast
    2. Osteocyte
    3. Osteoblast
    4. Fibrocyte

  22. Soft connective tissue membranes between the cranial bones at birth are:
    1. An indication of microcephaly
    2. Frontal sinuses
    3. Epiphyseal plates
    4. Cribifrom plates
    5. Fontanelles

  23. Endochondral and intramembranous are 2 mechanisms of:
    1. Bone remodeling
    2. Embryonic skeletal ossification
    3. Negative feedback
    4. Cartilage resorption

  24. Which of the folllowing is NOT a cranial suture?
    1. Epiphyseal
    2. Lambdoidal
    3. Coronal
    4. Sagittal
    5. Squamous


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