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In a resting state, the central part of ...

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

Text Solution

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The correct Answer is:
C
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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'

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.

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.

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.

Read the given Statements for skeletal muscles (i) Thin filaments are firmly attached to the Z - line . (ii) The light band is also called the I - band and contains mostly actin. (iii) A sarcomere is the functional unit of a myofibril between two adjacent A - bands . (iv) The central part of the thick filament , not overlapped by the thin filament is called the H - zone Which of these is/are CORRECT ?

Consider the following statements each with one or two blanks. (i)Repeated activation of the muscles can lead to the accumulation of (1) to anaerobic breakdown of glycogen in them, causing fatigue. (ii)The globular head of meromyosin is an active ATPase enzyme and has binding sites for(2) and active sites for(3) (iii)This central part of thick filament, not overlapping by thin filaments is called the(4)

Consider the following statements each with one or two blanks. (i) Repeated activation of the muscle can lead to the accumulation of (A) due to anaerobic breakdown of glycogen in them, causing fatigue. (ii) The globular head of meromyosin is an active ATPase enzyme and has binding sites for (B) active sites for (C) . This centre part of thick filament, not overlapped by thin filaments is called the (D) . Which one of the following options correctly fils the concerned blanks ?

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.

Read the statement regarding myofibril and choose the correct option 1. Each myofibril has alternate dark and light bands. 2. In the centre of each 'A' band is an elastic fibre called 'Z' -line 3. 'A' and 'I' bands are arranged alternately throughout the length of myofibril 4. Sarcomere is the functional unit of contraction 5. Central part of thick filament not overlapped by a thin filament is the 'M' line

MOTION-LOCOMOTION & MOVEMENT-EXERCISE -2 (NCERT Based Questions)
  1. The junction between a motor neuron and the sarcolemma of the muscle f...

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  2. Which points are correct for cardiac muscles of (A) They are stria...

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  3. The body weight contributed by muscles in a human adult is :

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  4. In paramoecium, the movement of food through cytopharynx take place by...

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  5. The striated appearance of the myofibril is due to the distribution pa...

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  6. Repeated activation of the muscles can lead to the accumulation of :

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  7. Muscles contain a red coloured oxygen storing pigment called

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  8. In a resting state, the central part of thick filament which is not ov...

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  9. During contraction of muscles :-

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  10. Which points are correct with the regarding of skeletal muscles ? (A...

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  11. Which character is not associated with white muscle fibres ?

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  12. Which points are correct about visceral muscles ?

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  13. Correctly match column-I with column -II .

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  14. Which muscles having functionally multinucleated conditions ?

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  15. The functional unit of contraction is :-

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  16. The correct sequence of events during relaxation of muscle is :- (i)...

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  17. Striated muscles are primarily involved in (A) Locomotory actions ...

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  18. Which character is // are associated with locomotion ? (A) All locom...

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  19. The thick filaments in 'A' band are held together in the middle of thi...

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  20. A neural signal reach in neuromuscular junction releases a nuerotransm...

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