QUIZ QUESTIONS ON SKELETAL SYSTEM

Multiple Choice Questions

1.  Which of the following is not part of axial skeleton?

a)     Sternum
b)     Mandible
c)     Humerus
d)     Sacrum
e)     Calvarium 

2.        All the following are components of appendicular skeleton except
a)     Clavicle
b)     Femur
c)     Pelvic bone
d)     Vertebrae
e)     Carpal bones

3.     The paraxial mesoderm around the neural tube gives rise to......
a)    Scleretome
b)    Somites
c)    Ectoderm
d)    Dermomyotome
e)    Neural crest

4.     The bones of the pelvic and shoulder girdles are from the mesenchymal cells form......
a)    Paraxial mesoderm
b)    Lateral plate mesoderm
c)    Intermediate mesoderm
d)    General mesoderm
e)    Neural crest

5.     During chondrogenesis, the mesenchymal cells first differentiate in to......
a)    Osteoblasts
b)    Chondrocytes
c)    Chondroblasts
d)    Chondroclasts
e)    None of the above

6.     The organic component of bone matrix is produced by: 
a)    Osteoblasts
b)    Osteocytes
c)    Osteoclasts
d)    Chondrocytes
e)    Chondroblasts 

7.     Which of the following cell types is responsible for synthesizing the organic component of cartilage matrix? 
a)    Osteocytes
b)    Chondrocytes
c)    Osteoblasts
d)    Chodroblasts
e)    Chondroclasts 

8.    ........... are cells that tear down and remodel bone
a)    Macrophages
b)    Osteocytes
c)    Osteocytes
d)    Chondroclasts
e)    Osteoclasts

9.     Intramembranous and Endochondral are 2 mechanisms of: 
a)    Tissue deposition
b)    Bone remodeling
c)    Embryonic skeletal ossification
d)    Cartilage resorption
e)    None of the above

10.   The flant bones of the skull develop by mean of....
a)     Endochondoral ossification
b)     Intramembranous ossification
c)     Calvarium ossification
d)     Internal ossification
e)     External ossification

11.    Temporary openings between the cranial bones at birth are: 
a)     Cranial openings
b)     Frontal sinuses
c)     Fontanelles
d)     Epiphyseal plates
e)     Cribifrom plates 


12.    After birth, continuous remodelling of bones occurs by coordinate action of...
a)     Osteocytes and osteoblasts
b)     Osteocytes and osteoclasts
c)     Osteoblasts and osteoclats
d)     Chondroblast and chondroclasts
e)     All of the above

13.    The two sources of membranous neuorocranium  are ........
a)     Paraxial and lateral mesoderm
b)     Paraxial mesoderm and neural crest cells
c)     Lateral mesoderm and neural crest cells
d)     Ectoderm and endoderm
e)     Intermediate mesoderm and neuroectoderm

14.    The mandibular process of the first arch develop in to
a)     mandibular process
b)     Mandible
c)     Maxillae
d)     Mandible and maxillae
e)     Facial bones

15.    The Mickel’s cartilage forms
a)     Malleus and incus
b)     Incus and stapes
c)     Malleus and stapes
d)     Ear ossicles
e)     Styloid process

16.    The first sets of bones that become fully ossified in the human embryo are
a)     Neurocranium
b)     Ear ossicles
c)     Clavicles and hip bone
d)     Viscerocranium
e)     Vertebral column

17.    During development, the notochord degenerate and form the....
a)     Centrum
b)     Nucleus pulposus
c)     Annulus fibrose
d)     Intervertebral disc
e)     Vertebral arch          MCQ  Ans. 17

18.    The outer covering of each bone made from connective tissue is called
a)     Perichondrium
b)     Periosteum
c)     Diaphysis
d)     Outer layer
e)     External cartilage

19.    .......exacts an inductive influence on the limb mesenchyme to initiate the growth and development of limb bones
a)     Apical ectodermal ridge
b)     Ectodermal apical ridge
c)     Apical mesodermal ridge
d)     Apical limb ridge
e)     Limbs inductor 

20.    The long shaft of the long bone is called
a)     Epiphysis
b)     Diaphragm
c)     Diaphysis
d)     Metaphysis
e)     Diaphyseal shaft          MCQ  Ans. 20

21.    Growth in the length of the long bone occurs at.....
a)     Periosteum
b)     Diaphysis
c)     Epiphysis
d)     Epiphysial plate
e)     Diaphysial plate

22.    ............ is the junction between the diphysis and epiphysis of the growing bone
a)     Articular cartilage
b)     Epiphysial cartilage
c)     Epiphysial plates
d)     Diaphysial-epiphysial junction
e)     Diaphysial plates
For question 23-28, choice whether the statement is True or False    
    23. The anterior fontanelle closes earlier than the posteror fontanelle

    24. At birth, both the diaphysis and epiphysis of long bone are largely ossified

    25. The entire limb skeleton is cartilaginous by the end of week six

    26.  During limb development, the upper limb rotate 90 medially

    27.  Most of the skeleton in the embryo is cartilage

     28. The limb buds become visible as an outpocketings from the dorsomedail body wall

29.   Excess of pituitary growth hormone will result in a condition called......
a)    Cretinism
b)    Dwarfism
c)    Acromegaly
d)    Giantism
e)    None of the above

30.   Incomplete closure of the vertebral column results in: 
a)    Scoliosis
b)    Spina bifida
c)    Lordosis
d)    Kyphosis
e)    Vertebral fissure 

31.   A letaral deviation of the alignment of the vertebral column is called a
a)    Lordosis
b)    Kyphosis
c)    Scoliosis
d)    Lateral deviation
e)    Vertebral deviation

32.   Premature closure of the cranial sutures may result to condition known as......
a)    Craniosynostosis
b)    Acrania
c)    Microcephaly
d)    Cranioschisis
e)    Hydrocephalus 

33.   All the following are common types of limb anomalies except
a)    Amelia
b)    Meromelia
c)    Micromelia
d)    Phocomelia
e)    Sternomelai


34.  ..... is type of spina bifida involving the spinal cord and meninges.
a)    Spina bifida meninga
b)   Spina bifida occulta 
c)    Spina bifida cystica
d)   Spina bifida chordoma
e)   Spina bifida vertebrata 

35.    ..... is a deformity in  which the sole of the foot is turned medially and the foot is adducted and plantar flexed
a)    Adducted foot
b)    Clubfoot 
c)    Cleft Foot
d)    Brachydactyly
e)    Congenital foot