BIOL 2457 EXAM 2 QUESTIONS WITH
CORRECT ANSWERS 2025/2026
1. yellow bone marrow CORRECT ANSWER fatty tissue found in the medullary cavity
of most adult long bones
2. red bone marrow CORRECT ANSWER produces red and white blood cells and
platelets- only located in trabeculae of spongy bones in adults
3. osteoporgenitor cells CORRECT ANSWER stem cells in periosteum and
endosteum, mitotically active
4. Osteoblasts CORRECT ANSWER bone forming cells
5. Osteocytes CORRECT ANSWER mature bone cells- mitotically inactive
6. osteoclasts CORRECT ANSWER Bone-destroying cells
7. periosteal cells CORRECT ANSWER bone lining cells on the external bone surface
8. endosteal cells CORRECT ANSWER bone lining cells on the internal bone surface
9. bone collar development CORRECT ANSWER week 9, osteoblasts created from
inside perichondrium- ossification process begins. then secrete osteoid against
hyaline
cartilage diaphysis creating the bone collar.
10. comminuted fracture CORRECT ANSWER bone breaks into many fragments
, 11. spiral fracture CORRECT ANSWER a fracture in which the bone has been twisted
apart
12. depression fracture CORRECT ANSWER broken bone portion is pressed inward
(skull fracture)
13. compression fracture CORRECT ANSWER occurs when the bone is pressed together
on itself (crushed)
14. epiphysial fracture CORRECT ANSWER a break in the bone that occurs at the
juncture of the epiphysis (end) and the diaphysis (shaft)
15. greenstick fracture CORRECT ANSWER bending and incomplete break of a bone;
most often seen in children
16. compound vs simple fracture CORRECT ANSWER Broken bone breaks through skin
vs. Bone breaks cleanly but not through skin
17. displaced vs non displaced fracture CORRECT ANSWER bone end is in normal
position vs bone is not in normal position
18. short, irregular, and flat bones CORRECT ANSWER have no diaphysis or
epiphyses, contain bone marrow between the trabeculae
19. Dipole CORRECT ANSWER thin plates of spongy bone that are covered by
compact bone (skull)
20. Rickets CORRECT ANSWER Vitamin D deficiency in children
CORRECT ANSWERS 2025/2026
1. yellow bone marrow CORRECT ANSWER fatty tissue found in the medullary cavity
of most adult long bones
2. red bone marrow CORRECT ANSWER produces red and white blood cells and
platelets- only located in trabeculae of spongy bones in adults
3. osteoporgenitor cells CORRECT ANSWER stem cells in periosteum and
endosteum, mitotically active
4. Osteoblasts CORRECT ANSWER bone forming cells
5. Osteocytes CORRECT ANSWER mature bone cells- mitotically inactive
6. osteoclasts CORRECT ANSWER Bone-destroying cells
7. periosteal cells CORRECT ANSWER bone lining cells on the external bone surface
8. endosteal cells CORRECT ANSWER bone lining cells on the internal bone surface
9. bone collar development CORRECT ANSWER week 9, osteoblasts created from
inside perichondrium- ossification process begins. then secrete osteoid against
hyaline
cartilage diaphysis creating the bone collar.
10. comminuted fracture CORRECT ANSWER bone breaks into many fragments
, 11. spiral fracture CORRECT ANSWER a fracture in which the bone has been twisted
apart
12. depression fracture CORRECT ANSWER broken bone portion is pressed inward
(skull fracture)
13. compression fracture CORRECT ANSWER occurs when the bone is pressed together
on itself (crushed)
14. epiphysial fracture CORRECT ANSWER a break in the bone that occurs at the
juncture of the epiphysis (end) and the diaphysis (shaft)
15. greenstick fracture CORRECT ANSWER bending and incomplete break of a bone;
most often seen in children
16. compound vs simple fracture CORRECT ANSWER Broken bone breaks through skin
vs. Bone breaks cleanly but not through skin
17. displaced vs non displaced fracture CORRECT ANSWER bone end is in normal
position vs bone is not in normal position
18. short, irregular, and flat bones CORRECT ANSWER have no diaphysis or
epiphyses, contain bone marrow between the trabeculae
19. Dipole CORRECT ANSWER thin plates of spongy bone that are covered by
compact bone (skull)
20. Rickets CORRECT ANSWER Vitamin D deficiency in children
