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Sarcomere

Which part of...

Question

Which part of the sarcomere is formed only by myosin filaments in a relaxed state?

A

Isotropic band

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B

Anisotropic band

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C

O band

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D

H zone

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Solution

The correct option is D
H zone

H – zone is the central region of A band with only myosin filaments.

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Q. Describe the structure of actin and myosin filaments.

(The Length Sarcomere is

2.5 μ m (

= 1 μ m,)

= 1.5 μ m

1

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Actin filament is surrounded by

3

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Q. Assertion :Rigor mortis is the state of body stiffening prior to death. Reason: It is due to relaxation of action and myosin filaments.

Q. Identify the correct statements.

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

Q. Assess the statements.
1. A-bands of the muscle is dark and contain myosin.
2. I-bands are the light bands and contain actin.
3. During muscle contraction the A-band contracts.
4. The part between the two Z-lines is called as sarcomere.
5. The central part of thick filament, not overlapped by thin filament, called H-zone.
Of the above statements.

Q. Which of the following is a component of thin filaments of a sarcomere?

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