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L 5, muscle, Anatomy

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1- The smooth muscle fibers may have irregular form this type acts to produce mass contraction 
as in the wall of 

a-Blood vessels 
b. Digestive tube 
c- Uterus . 
d-ureter 
e- Erector pill muscle 

2- The skeletal muscle in the body forms about 40%-45% of the body Weight, it characterized by 

a- Involuntary 
b- Easily fatigued 
c- Has central nucleus 
d- Has fine striation 
e- Has special conduction systems 

3-The skeletal muscle has two end, origin and insertion, the origin Characterized by 

a- More mobile end 
b- Usually the proximal end 
c- Usually the distal end 
d- Mostly tendinous 
e- Never multiple

4- The cardiac muscle forms the myocardium of the heart and characterized By 

a- Has non striation 
b- Not branched
c- Has intercalated disc 
d- Voluntary 
e-Has peripheral nucleus 

5- smooth muscles present as circular sheets only in : 

a- tube 
b-Wall of blood vessels 
c-Urinary bladder 
d-Urogenital tract 
e-Uterus 

6-The cardiac rnuscle has the following characters except : 

a-Involuntary 
b-Striated 
c-Rapid contraction I 
d-Easily fatigued 
e-They give branches to form a network 

7-Concerning the skeletal muscles ,all are true except : 

a-Each muscle fiber has multiple nuclei 
b-They act voluntarys 
c:They respond by a slow and sustained contraction 
d-They are easily fatigued 
e-They show cross striations


8-Conceming the visceral muscles ,all are true except :  

a-.Each muscle fiber is a spindle —shaped cell with multipl nuclei 
b-They act involuntary 
c-They respond by a slow and sustaine contraction 
d-They not easily fatigued 

9-If the muscle fibers run oblique and attached to both sides of a ten, muscle arrangement is said 
to be 

a-Parallel 
b-Unipennate 
c-bipennate 
d-mltipennate 
e-Circumpennate 

10-The muscle fibers parallel to the line of pull has the following character, except: 

a-The fibers extend throughout the length of the muscle 
b-The fibers are relatively longer 
c-They are few in number 
d-They provide a greater range of movement 
e-they have More force of contraction



ANSWER 


1-c 
2-b 
3-b 
4-c 
5-b
6-d 
7-c 
8-a 
9-c 
10-e


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