The Skeletal System

Question 1

Bone consists mainly of …

a) Collagen
b) water
c) inorganic substances
d) Ca10(PO4)6(OH)2

Answer 1

c) inorganic substances

d) Ca10(PO4)6(OH)2

Question 2

Organic components of the bone matrix are:

a) Laminin
b) Ceratin
c) Collagen
d) Proteoglycan

Answer 2

c) Collagen

d) Proteoglycan

Question 3

Which of the following statements about collagens are right, which are wrong (mark wrong):

a) Collagen molecules form tetrameric helixes
b) Collagen helixes are connected via covalent intra- and inter-molecular bonds
c) Collagen fibers consist of several collagen fibrils
d) Collagen is a polysaccharide

Answer 3

b) Collagen helixes are connected via covalent intra- and inter-molecular bonds
d) Collagen is a polysaccharide

Question 4

To actively bone forming cells belong:

a) fibroblasts
b) osteoclasts
c) chondrocytes
d) osteoblasts

Answer 4

d) osteoblasts

Question 5

Omnipotent undifferentiated mesenchymal cells can develop into:

a) osteocytes
b) smooth muscle cells
c) chondroblasts
d) adipouse cells

Answer 5

a) osteocytes
b) smooth muscle cells
c) chondroblasts
d) adipouse cells

Question 6

One distinguishes between . . .
a)  woven and lamellar,
b)  compact and secondary,
c)  primary and secondary,
d)  long and flat
... bones.

Answer 6

a) woven and lamellar,
c) primary and secondary,
d) long and flat

Question 7

Bones of the cranium are

a) scapula bone
b) frontal bone
c) temporal bone
d) trabecula bone

Answer 7

b) frontal bone

c) temporal bone

Question 8

Ossification

Name the picture!

Von oben nach unten!

Answer 8

a) osteoblast
b) osteoid
c) mineralized matrix
d) osteocyte

Von oben nach unten :D

Question 9

The sort of bone initially produced in bone fracture repair is

a) woven bone
b) spongy bone
c) compact bone
d) primary bone

Answer 9

a) woven bone

d) primary bone

Question 10

To prominent pathological conditions affecting bone belong:

a) rachitis;
b) osteogenesis imperfecta;
c) osteoporosis;
d) osteopetrosis

Answer 10

a) rachitis;
b) osteogenesis imperfecta;
c) osteoporosis;
d) osteopetrosis