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NMS Set 5 Quiz - Bones, teeth and connective tissue.

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Question 1

Question
What type of cells form bone?
Answer
  • Osteoblasts
  • Osteoclasts

Question 2

Question
What type of cells resorb bone?
Answer
  • Osteoblasts
  • Osteoclasts

Question 3

Question
Osteocytes are trapped osteoblasts that maintain the bone matrix.
Answer
  • True
  • False

Question 4

Question
Immature bone that has a random collagenous structure is known as what?
Answer
  • Woven bone
  • Lamellar bone
  • Compact bone

Question 5

Question
Mature bone is known as what?
Answer
  • Lamellar bone
  • Compact bone
  • Woven bone

Question 6

Question
Cancellous (spongy) bone contains haversian canals.
Answer
  • True
  • False

Question 7

Question
What is the main component of enamel?
Answer
  • Calcium hydroxyapatite
  • Magnesium hydroxyapatite
  • Dentine
  • Calcium

Question 8

Question
Dentine is innervated and can repair itself.
Answer
  • True
  • False

Question 9

Question
Dental pulp contains post natal stem cells.
Answer
  • True
  • False

Question 10

Question
Fluoride substitution in calcium hydroxyapatite promotes caries.
Answer
  • True
  • False

Question 11

Question
Carbonate substitution in calcium hydroxyapatite promotes caries.
Answer
  • True
  • False

Question 12

Question
What inorganic component does bone have?
Answer
  • Carbonated hydroxyapatite
  • Calcium hydroxyapatite

Question 13

Question
What type of collagen do dentine, cementum and enamel all share?
Answer
  • Type 1
  • Type 7
  • Type 4
  • Type 3

Question 14

Question
Odontoblasts perform what function?
Answer
  • Produce dentine
  • Produce enamel
  • Produce cementum

Question 15

Question
Cementoblasts perform what function?
Answer
  • Produce dentine
  • Produce cementum
  • Produce enamel

Question 16

Question
Ameloblasts perform what function?
Answer
  • Produce dentine
  • Produce cementum
  • Produce enamel

Question 17

Question
Matrix vesicle mineralisation occurs how?
Answer
  • Vesicles accumulate Ca2+ and P -> Internal surface mineralisation -> Rupturing (release of crystal) -> accumulation
  • Acid phosphoproteins bind to collagen -> promote crystal growth (scaffold)

Question 18

Question
Heterogenous nucleation mineralisation occurs how?
Answer
  • Vesicles accumulate Ca2+ and P -> Internal surface mineralisation -> Rupturing (release of crystal) -> accumulation
  • Acid phosphoproteins bind to collagen -> promote crystal growth (scaffold)

Question 19

Question
How does mineralisation in enamel occur?
Answer
  • Ameloblasts which secrete a matrix that acts as a scaffold
  • Odontoblasts which secrete a matrix that acts as a scaffold

Question 20

Question
Osteoporosis is when...
Answer
  • Bone loss > Bone deposition
  • Bone deposition > bone loss

Question 21

Question
What bone forms in a fracture site?
Answer
  • Woven
  • Lamellar
  • Cancellous
  • Compact

Question 22

Question
Fluorosis is characterised by...
Answer
  • High resistance to caries
  • Hypomineralised enamel
  • Rapid deciduous tooth loss in children

Question 23

Question
Osteogenesis imperfecta is caused by a mutation in type 1 collagen.
Answer
  • True
  • False

Question 24

Question
Dentinogenesis imperfecta leads to hypomineralised enamel.
Answer
  • True
  • False

Question 25

Question
Amelogenesis imperfecta leads to hypomineralised enamel.
Answer
  • True
  • False

Question 26

Question
Dense connective tissue is found where?
Answer
  • Tendons
  • Ligaments
  • Areolar tissue
  • Adipose tissue

Question 27

Question
Loose connective tissue is found where?
Answer
  • Tendons
  • Ligaments
  • Adipose tissue
  • Reticular tissue

Question 28

Question
What is the function of fibroblasts?
Answer
  • Produces collagen
  • Produces cartilage

Question 29

Question
What is the function of chondrocytes?
Answer
  • Produce collagen
  • Produce cartilage

Question 30

Question
ECM is typically composed of what substances?
Answer
  • Collagen
  • Elastin
  • Ground substance
  • Proteoglycans

Question 31

Question
A meshwork collagen arrangement takes what sort of load?
Answer
  • Compressional
  • Stretch

Question 32

Question
A longitudinal collagen arrangement is for?
Answer
  • Compression
  • Stretch

Question 33

Question
Ground substance is mostly composed of what?
Answer
  • Water
  • Proteoglycans
  • Glycoproteins
  • Cartilage

Question 34

Question
What is hyaluronic acid and what is its function?
Answer
  • A proteoglycan
  • A glycoprotein
  • Secretes water
  • Stores water

Question 35

Question
What is chondroitin sulphate and what is its function?
Answer
  • A glycoprotein
  • A proteoglycan
  • Offers compressional resistance in cartilage
  • Gives flexibility in cartilage
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