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Most correctly guessed answers

      • Bones contain 99.9% of the body's stock of which mineral?
      • Ca2+
      • 100.0%
      • What is the mineral component of bones which makes them rigid?
      • Hydroxyapatite
      • 100.0%
      • What does the osteoclast do to bone?
      • Destroys it
      • 100.0%
      • What does the osteoblast do to bone?
      • Synthesizes it
      • 100.0%
      • [...] are cells which destroy bone.
      • Osteoclasts
      • 100.0%
      • [...] are cells which synthesize bone.
      • Osteoblasts
      • 100.0%
      • [...] bone contains red bone marrow.
      • Spongy
      • 100.0%
      • [...] bone contains yellow bone marrow.
      • Compact
      • 100.0%
      • The skeleton is completely renewed every [...] years.
      • 10
      • 100.0%
      • The [...] is the cavity in the middle of a compact bone which contains yellow bone marrow.
      • medullary, cavity
      • 100.0%
      • Osteoclasts burrow through compact bones, leaving behind tunnels called [...].
      • Haversian canals
      • 100.0%
      • What is an osteocyte?
      • Osteoblast after it has become imprisoned in bone matrix
      • 100.0%
      • Osteoblasts lay down new bone matrix in concentric circles called [...].
      • lamellae
      • 100.0%
      • Osteocytes exhange nutrients through [...].
      • canaliculi
      • 100.0%
      • Osteocalcin is a marker of which tissue?
      • Bone
      • 100.0%
      • What are the 4 major types of cells found in bone?
      • Osteoprogenitor
        Osteoblast
        Osteoclast
        Osteocyte
      • 100.0%
      • Which 2 ions are stored in bone?
      • Ca2+
        HPO(4)2-
      • 100.0%
      • Is bone mineralized?
      • Yes
      • 100.0%
      • What are the 2 types of ossification processes?
      • Endochondral
        Intramembranous
      • 100.0%
      • Which kind of ossification depends on cartilage?
      • Endochondral
      • 100.0%
      • What are 2 other names for spongy bone?
      • Cancellous and trabecular
      • 100.0%
      • Can bone grow appositionally?
      • Yes
      • 100.0%
      • Can bone grow interstitially?
      • No
      • 100.0%
      • The non-articular surface of bone is covered by [...].
      • periosteum
      • 100.0%
      • The medullary cavity of a bone is lined with [...].
      • endosteum
      • 100.0%
      • The [...] of the bone, between the diaphysis and the epiphysis, contains the growth plate.
      • metaphysis
      • 100.0%
      • Immature bone is [...] in type, while both compact and spongy bone are [...].
      • woven, lamellar
      • 100.0%
      • In spongy bone, lamellae are apposed to form [...].
      • trabeculae
      • 100.0%
      • In spongy bone, how are trabeculae arranged?
      • Along lines of stress
      • 100.0%
      • Osteoblasts secrete the enzyme [...], which neutralizes the inhibitory effects of pyrophosphate on Ca2+ deposition.
      • alkaline phosphatase
      • 100.0%
      • The ruffled border of osteoclasts is made of [...].
      • microvilli
      • 100.0%
      • Osteoclasts secrete [...] to demineralise bone matrix.
      • H+
      • 100.0%
      • Osteoclasts secrete [...] to degrade the organic components of bone matrix.
      • lysosomal enzymes
      • 100.0%
      • [...] ossification occurs when bone develops from a pre-existing cartilage model.
      • Endochondral
      • 100.0%
      • [...] ossification occurs when bone develops in mesenchyme.
      • Intramembranous
      • 100.0%
      • What is a medullary cavity?
      • Cavity in a compact bone
      • 75.0%
      • How long does newly formed bone matrix take to mineralise?
      • 48 hours
      • 75.0%
      • Osteoclasts resorb bone and leave behind traces called [...].
      • Howship's lacunae
      • 75.0%
      • What is the chemical reaction which allows osteoclasts to degrade bone?
      • H2O + CO2 --> HCO3- + H+
      • 75.0%
      • The medullary cavity of a compact bone is filled with [...] bone marrow.
      • yellow
      • 75.0%
      • What is another name for compact bone?
      • Dense
      • 75.0%
      • Flat bones are a sandwich of [...] bone between 2 layers of [...] bone.
      • spongy, compact
      • 75.0%
      • A Haversian system/osteon is surrounded by a [...] of mineralized matrix.
      • cement line
      • 75.0%
      • Osteoprogenitor cells are derived from [...] stem cells.
      • mesenchymal
      • 75.0%
      • Where are osteoprogenitor cells found in spongy bone?
      • Near blood vessels
      • 75.0%
      • Where are osteoprogenitor cells found in compact bone?
      • At the periosteum and the endosteum
      • 75.0%
      • Calcium deposition in bone formation is [...]ted by pyrophosphate.
      • inhibi
      • 75.0%
      • [...] cells are found at the surface of bone when it is not being remodelled.
      • Bone-lining
      • 75.0%
      • Osteoclasts derive from [...] stem cells.
      • haemopoeitic
      • 75.0%
      • In the growth plate of a bone, the zone of [...] is where chondrocytes proliferate to give longitudinal columns.
      • proliferation
      • 75.0%
      • In the growth plate of a bone, the zone of [...] is where chondrocytes enlarge and the matrix calcifies.
      • hypertrophy and calcification
      • 75.0%
      • In the growth plate of a bone, the zone of [...] is where chondrocytes die and lacunae are invaded by osteoclasts, osteoprogenitor cells, and capillaries.
      • degeneration
      • 75.0%
      • In the growth plate of a bone, the [...] zone is where osteoblasts lay down bone on top of the remaining calcified cartilage.
      • osteogenic
      • 75.0%
      • Newly formed woven bone is also known as [...].
      • primary spongiosum
      • 75.0%
      • In the growth plate of a bone, the zone of [...] is where the chondrocytes are quiescent.
      • reserve cartilage
      • 50.0%