The H-Zone in the skeletal muscle fibre is due to 

(1) the central gap between actin filaments extending through myosin filaments in the A-band

(2) extension of myosin filaments in the central portion of the A-band

(3) the absence of myofibrils in the central portion of A-band

(4) the central gap between myosin filaments in the A-band

Subtopic:  Skeletal Muscle: Sarcomere |
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An example of stretch reflex triggered by passive muscle movement is the

(1) tendon reflex               

(2) ipsilateral reflex

(3) flexor reflex         

(4) patellar reflex

Subtopic:  Muscle Contraction: Other Considerations |
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Gerdy fibres are 

(1) ligament of neck       

(2) ligament of ankles

(3) ligament of palm       

(4) ligament of face.

Subtopic:  Muscle Contraction: Other Considerations |
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Consider the diagram given below.

Parts labelled as A, B, C, D, E and F respectively indicate.

(1) Sacrum, ilium, pubis, femur, tibia and fibula

(2) Ilium, pubis, sacrum, femur, fibula and tibia

(3) Sacrum, pubis, ilium, femur, tibia and fibula

(4) Ilium, sacrum, pubis, femur, tibia and fibula

Subtopic:  Number of Bone in Appendicular Skeleton |
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In old age, stiffness of joints is due to the 

(1) hardening of bones

(2) inefficiency of muscles

(3) decrease in synovial fluid

(4) enlargement of bones

Subtopic:  Synovial Joint |
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Oxygen content reduction makes the glycolyse (glycogenesis) intensity increased due to

(1) increase of ADP concentration in cell

(2) increase of NAD+ concentration in cell

(3) increase of ATP concentration in cell

(4) increase of concentration of peroxides and free radicals 

Subtopic:  Energy for Muscle Contraction |
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Pick out the correct match

(1) Sternum       - 14

(2) Pelvis           - 3

(3) Ribs             - 20

(4) Face            - 5

Subtopic:  Appendicular Skeleton: Girdle |
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Match Column-I with Column-II:

Column-I

Column-II

A.   Structural and functional unit of a myofibril

B.   Protein of thin filament

C.   Protein of thick filament

D.   The central part of thick filament not overlapped by thin filament

I. H-zone

II. Myosin

III. Sarcomere

IV. Actin

(1) A - I, B - II, C - III, D - IV

(2) A - I, B - III, C - II, D - IV

(3) A - I, B - IV, C - III, D - II

(4) A - III, B - IV, C - II, D - I

Subtopic:  Skeletal Muscle: Sarcomere |
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Sarcomere is the area between:

(1) 2 H-zones       

(2) 2 Z-lines                  

(3) 2 M-lines                  

(4) 2 A-bands

Subtopic:  Skeletal Muscle: Sarcomere |
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Light bands (thin filaments) contain actin and are called:

(1) A-bands or Isotropic band            

(2) A-bands or Anisotropic bands

(3) I-bands or Isotropic bands           

(4) I-bands or Anisotropic bands

Subtopic:  Skeletal Muscle: Sarcomere |
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