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During muscle contraction Z-lines get cl...

During muscle contraction Z-lines get closer.

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Statements A-bands of the muscle are dark and contain myosin I-band are the light bands and contain action During muscle contration the A-band contracts The part between the two Z-lines is called as saromere The central part of thin filament, not over-lapped by thick filament is called H-zone of the above statements.

Go through the following statements During muscle contraction, the width of A-band remains constant while I-band shortens. During muscle contraction, the Ca^(2+) released from the SR bind to the troponin component of thin filament The process of muscle contraction is faster in smooth muscle as they have a well developed sarcoplasmic reticulum. The red muscle fibres have abundant mitochondria, low glycogen and poorly formed sarcoplasmic reticulum.

Following muscle contraction in response to a stimulus, the muscle temporarily cannot respond. This known as

SANTRA PUBLICATION-MOVEMENT AND LOCOMOTION-True or False Statement Questions:
  1. Intercalated discs make up striations in the skeletal muscle.

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  2. The strongest muscle in the body is present in the jaw.

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  3. Actin is a globular protein which assembles as a long beady structure ...

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  4. The only movable bone in the skuil is the mandible.

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  5. ATP is involved in both sliding filament mechanism and in the maintena...

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  6. In mammals, the cervical regiun of vertebral column always consists of...

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  7. A drop in the force of contraction after prolonged stimulation is know...

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  8. Involuntary muscles have no myosin or actin.

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  9. Slow muscle fibres posses myoglobin.

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  10. Humerus have a sigmoid notch.

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  11. Appendicular skeleton form the axis of the skeleton.

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  12. Oesteoporosis is a common disease of bone.

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  13. During muscle contraction Z-lines get closer.

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  14. Paramoecium shows flagellar movement.

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  15. Smooth muscles maintain posture of the body.

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  16. The sarcoplasmic reticulum is identical with the endoplasmic recticulu...

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  17. Cytoplasmic continuation in between neighbouring cells is known as syn...

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  18. Chronaxie is a state of rigidity that develops in the muscles after de...

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  19. Red colour of red muscle fibre is due to presence of red blood corpusc...

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  20. Skeletal muscle is developed from myotomes.

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