Globular head of myosin molecule act as

1.  ATPase

2.  CTPase

3.  TTPase

4.  GTPase 

Subtopic:  Energy for Muscle Contraction |
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Contractile unit of muscle is part of myofibril between

1.  Z-line and l-band

2.  Z-line and Z-line

3.  Z-line and A-band

4.  A-band and l-band 

Subtopic:  Excitation Contraction Coupling II |
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The ion that must be present in an adequate amount for binding of cross-bridges with actin is 

1.  Ca+2

2.  Na+

3.  K+

4.  Mg+2

Subtopic:  Excitation Contraction Coupling II |
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According to the sliding filament theory of muscle contraction, the filament that move to shorten a muscle are 

1.  Myosin

2.  Actin

3.  Collagen

4.  Creatine phosphate 

Subtopic:  Excitation Contraction Coupling II |
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In a contracted skeletal muscle fiber

1.  M line disappears

2.  H-zone elongates

3.  l-band remains constant

4.  A-band disappears 

Subtopic:  Excitation Contraction Coupling II |
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Sheet or broadband of fibrous connective tissue that is deep to the skin and surrounds entire muscles and other organs of the body are

1.  Epimysium

2.  Fascicule

3.  Endomysium

4.  Fascia 

Subtopic:  Skeletal Muscle: Basic Anatomy |
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The muscle is a specialised tissue which is originated from

1.  Endoderm

2.  Mesoderm

3.  Ectoderm

4.  Yolk sac 

Subtopic:  Skeletal Muscle: Basic Anatomy |
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A collagenous connective tissue layer hold the muscle bundles together.

1.  Perimysium

2.  Endomysium

3.  Epimysium

4.  Fascia 

Subtopic:  Skeletal Muscle: Basic Anatomy |
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The plasma membrane of the muscle fibre is called

1.  Sarcoplasma

2.  Sarcolemma

3.  Sarcoplasmic Reticulum

4.  Syncytial 

Subtopic:  Skeletal Muscle: Basic Anatomy |
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The dark band present on myofibril is

1. Isotropic band

2. Anisotropic band

3. Hensen's zone 

4. M-line

Subtopic:  Skeletal Muscle: Basic Anatomy |
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