Home
Class 11
BIOLOGY
During muscle contraction...

During muscle contraction

A

Size of A-band remains the same

B

Size of H-zone becomes smaller

C

Size of I-band decreases

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
During muscle contraction size of A-bands remains the same.
Promotional Banner

Topper's Solved these Questions

  • LOCOMOTION AND MOVEMENT

    A2Z|Exercise Section A: Topicwise Questions Topic 4 : Skeletal System|50 Videos

  • LOCOMOTION AND MOVEMENT

    A2Z|Exercise Section A: Topicwise Questions Topic 5 : Joints|19 Videos

  • LOCOMOTION AND MOVEMENT

    A2Z|Exercise Section A: Topicwise Questions Topic 2 : Skeletal Muscle And Structure Of Contractile Proteins|9 Videos

  • EXCRETORY PRODUCTS AND THEIR ELIMINATION

    A2Z|Exercise Section C: Previous Years' Examination Questions (NEET/AIPMT Questions)|88 Videos

  • MOCK TEST 1

    A2Z|Exercise Exercise|90 Videos

Similar Questions

Explore conceptually related problems

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.

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

Which of the following statements about the mechanism of muscle contraction are correct ? (i) Acetylcholine is released when the neural signal reaches the motor end plate. Muscle contraction is initiated by a signal sent by CNS via sensory neuron. (iii) During muscle contraction, isotropic band gets elongated (iv) Repeated activation of the muscles can lead to lactic acid accumulation.

Which statements about muscle contractions are true (i) Acetylcholine is released when neural signal reaches motor end plate (ii) Muscle contraction is initiated by a signal sent by CNS via a sensory neuron (iii) During muscle contraction , isotropic band gets elongated (iv) Repeated activation of the muscle can lead to lactic acid accumulation .

Explain the initiation of muscle contraction. What is the role of sarcoplasmic reticulum, myosin head and F-actin during contraction in striated muscles?

Which is true of muscle contraction?

Basic unit of muscle contraction is

Which of the following remains constant during skeletal muscle contraction?

Which of the following muscles contracts during normal expiration ?

A2Z-LOCOMOTION AND MOVEMENT-Section A: Topicwise Questions Topic 3 : Mechanism Of Muscle Contraction
  1. In the given figure how many sarcomeres are seen?

    Text Solution

    |

  2. Read the following statements and find out the incorrect statement.

    Text Solution

    |

  3. Statements: 1. A bands are dark and contain myosin.  I-bands are ligh...

    Text Solution

    |

  4. During contraction of muscles Ca^(2+) attaches to

    Text Solution

    |

  5. Substance that accumulates in a fatigued muscle is

    Text Solution

    |

  6. Muscle band that remains unchanged during contraction and relaxation o...

    Text Solution

    |

  7. Match the following and mark the correct option {:("Column I", " ""C...

    Text Solution

    |

  8. ATPase enzyme needed for muscle contraction is located in " ...

    Text Solution

    |

  9. The functional unit of contractile system in a striated muscle is

    Text Solution

    |

  10. Which one is a bone of forelimb?

    Text Solution

    |

  11. Red muscles fibres are rich in

    Text Solution

    |

  12. The reactions which change lactic acid into glycogen

    Text Solution

    |

  13. Sliding filament theory of muscle contraction was given by

    Text Solution

    |

  14. Which is true of muscle contraction?

    Text Solution

    |

  15. During muscle contraction

    Text Solution

    |

  16. Which of the following ions help in muscle contraction ?

    Text Solution

    |

  17. During strenous exercise glucose is converted into

    Text Solution

    |

  18. Which of the following is a source of energy for muscle contraction ?

    Text Solution

    |

  19. Which one yields ATP required for muscle contraction?

    Text Solution

    |

  20. EDTA injected into muscles combines with Ca^(2+) and

    Text Solution

    |