Home
Class 11
BIOLOGY
Fill in the blanks.  a. The light band ...

Fill in the blanks. 
a. The light band contains actin and is called I band.
b. The thick filaments in the .....2 band are held together in the middle of this band by a thin fibrous membrane called .3. line.
c. In the centre of each ‘1‘ band is an elastic fibre called ...4... line which bisects it,
d. The central portion of the thick filament which is not overlapped by thin filaments is called the ...'5'

A

1-Isotropic, 2-'M’. 3-'Z', 4--'A', 5-H zone

B

1-anisotropic, 2-'1' 3-'M',4-'Z', 5-sarcomere

C

1-'l', 2-'A', 3-'M', 4-'2', 5- 'H' zone

D

1-A’. 3-'M' 4-'Z', 5-sarcomere

Text Solution

Verified by Experts

The correct Answer is:
C
a. The light band contain actin and is called 'I' (isotropic) band.
b. The thick filaments in the 'A' band are held together in the middle of this band by a thin fibrous membrane called 'M' line.
c. In the centre of each 'I' band is an elastic fibre called 'Z' line which bisects it.
d. The central portion of the thick filament which is not overlapped by thin filaments is called the H zone.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • LOCOMOTION AND MOVEMENT

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

  • LOCOMOTION AND MOVEMENT

    A2Z|Exercise Section A: Topicwise Questions Topic 3 : Mechanism Of Muscle Contraction|25 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

The thick filaments ih'the A-band of a myofibril are held together in the middle of this band by a thin fibrous membrane called

Fill it he blanks with the suitable words The thick filaments in the 'A' band are also held together in the middle of this and by a thin fibrous membrane called (a)_____. The 'A' and 'I' bands are arranged alternately throughout the length of the (b)____. The portion of the myofibril between two successive 'Z' lines is considered as the functional unit of contraction and is called a (c)_____.

Knowledge Check

  • The thick filaments in 'A' band are held together in the middle of this band by a thin membrane called

    A
    Z-line
    B
    M-line
    C
    H-line
    D
    O-line

  • The thick filaments in 'A' band are held together in the middle of this band by a thin membrane called

    A
    Z-line
    B
    M-line
    C
    H-line
    D
    O-line

  • In a resting state, the central part of thick filament which is not overlappled by thin filament is called :

    A
    A-band
    B
    M-line
    C
    H-zone
    D
    I-band

    • Similar Questions

    Explore conceptually related problems

    Isotropic band in a striated muscle fibre

    In the center of I-Band, is an elastic fiber, which bisect it

    The light band of a myofibril is

    Assertion : Contraction of a muscle fibre takes place by the sliding of the thin filaments over the thick filaments. Reason : The central part of thick filament is not overlapped by thin filaments in a resting state.

    Read the following statements (A to D) and select the one option that contains both correct statements. A. Z-line is present in the centre of the light band. B. Thin filaments are firmly attached to the M-line. C. The central part of thick filaments, not overlapped by thin filaments is called Z-band. D. Light band contains only thin filaments.

    Home
    Profile