The structural and functional unit of a muscle fiber is ???
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Structural and functional unit of a muscle fiber is Sarcomere.
- A sarcomere is defined as the segment between two adjacent Z-lines.
- Surrounding the Z-line there is I-band (for isotropic).
- I-band is made of thin filaments which is not superimposed by tmyosin.
- Following the I-band is the A-band (for anisotropic).
- The Anisotropic band contains both thick and thin filaments.
- Within the A-band is a paler region called the H-zone . For the lighter appearance under a polarization microscope this type of name is given.
- H-band is the part of the thick filaments which does not consist of actin.
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The structural and functional unit of a muscle fiber is sarcomeres.
Explanation:
Muscle fibers are composed of myofibrils that contain actin and myosin.
The unit is called sarcomere which is responsible for the formation of skeletal muscle.
It helps in contracting muscles.
Sarcomere is covered by membrane called as sarcolemma and the the cytoplasm is called sarcoplasm.
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