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What is sarcomere ?...

What is sarcomere ?

A

Part between two H-lines

B

Part between two A-lines

C

Part between two I-bands

D

Part between two Z-lines

Text Solution

Verified by Experts

The correct Answer is:
D
Sarcomere is a part of myofibril between two successive Z-lines, which consists of two l-band halves, and an A-band between them. It is the functional unit of myofibril.
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Knowledge Check

  • A sarcomere is :

    A
    the area between two intercalated discs
    B
    the nonfunctional unit of skeletal muscle
    C
    the wavy lines on the cell, as seen in a microscope
    D
    the contractile unit between two Z disc

  • Which of the following is not a structure found inside a single sarcomere ?

    A
    A band
    B
    Z line
    C
    M line
    D
    I band

  • Statements : 1. A bands are dark and contain myosin 2. I-bands are light and contain actin 3. During action, A band contracts 4. Part between two Z-lines is sarcomere 5. Central part of thin filament, not overlapped by thick filaments is H-zone.

    A
    1,2 and 3 are correct, 2 and 4 incorrect
    B
    1,3 and 5 correct, 2 and 4 incorrect
    C
    1,2 and 4 correct, 3 and 5 incorrect
    D
    1 and 2 correct, 3,4 and 5 incorrect.

    • Similar Questions

    Explore conceptually related problems

    What is compared with what in controlling ?

    Statements: 1. A bands are dark and contain myosin. I-bands are light and contain actin. 3. During action, A band contracts. 4. Part between two Z-lines is sarcomere. 5. Central part of thin filaments, not overlapped by thick filaments is H-zone.

    The length of sarcomere is about

    A firm hold for the filaments in a sarcomere is provided by

    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.

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