6. A patient with osteoporosis has excessive bone breakdown….

6. A pаtient with оsteоpоrosis hаs excessive bone breаkdown. Which cells are overactive? A. OsteoblastsB. OsteocytesC. OsteoclastsD. Fibroblasts 7. Under a microscope, concentric rings surrounding a central canal are seen. These structures are: A. TrabeculaeB. OsteocytesC. OsteonsD. Lamellae of spongy bone 8. A weightlifter has denser bones than a sedentary person because: A. Exercise weakens boneB. Exercise has no effect on boneC. Mechanical stress stimulates bone growthD. Calcium is removed during exercise 9. Which muscle tissue type is voluntary and striated? A. Smooth muscleB. Cardiac muscleC. Skeletal muscleD. Visceral muscle 10. A medical student identifies the femur as a: A. Flat boneB. Short boneC. Long boneD. Irregular bone 11. A surgeon carefully preserves the outer covering of bone to allow healing after surgery. This covering is the: A. EndosteumB. PerichondriumC. PeriosteumD. Articular cartilage 12. Slightly movable joints between vertebrae are classified functionally as: A. SynarthrosisB. AmphiarthrosisC. DiarthrosisD. Synovial 13. In a lab experiment, calcium is removed from bone tissue. What happens? A. Bone becomes harderB. Bone becomes rubberyC. Bone dissolves completelyD. Bone becomes brittle 14. The sternum protecting the heart is classified as a: A. Long boneB. Flat boneC. Short boneD. Irregular bone