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The thick filaments in 'A' band are held...

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

Text Solution

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The correct Answer is:
To answer the question regarding the thick filaments in the 'A' band being held together in the middle by a thin membrane, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Structure of Myofibrils**: - Myofibrils are the basic rod-like units of a muscle cell and are composed of repeating units called sarcomeres. Each sarcomere contains thick and thin filaments. 2. **Identifying the A Band**: - The A band is the dark band in the sarcomere and consists of thick filaments (myosin) and overlapping thin filaments (actin). 3. **Role of M Line**: - The thick filaments in the A band are held together in the middle by a structure known as the M line. The M line is a thin membrane that serves as an attachment point for the thick filaments. 4. **Conclusion**: - Therefore, the answer to the question is that the thick filaments in the A band are held together in the middle of this band by a thin membrane called the **M line**. ### Final Answer: The thick filaments in the 'A' band are held together in the middle of this band by a thin membrane called the **M line**. ---
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