Advertisements
Advertisements
प्रश्न
Sarcolemma, sarcoplasm and sarcoplasmic reticulum refer to a particular type of cell in our body. Which is this cell and to what parts of that cell do these names refer to?
Advertisements
उत्तर
Each muscle fibre or muscle cell is lined by the plasma membrane called sarcolemma enclosing the sarcoplasm. A muscle fibre is a syncytium as the sarcoplasm (cytoplasm) contains many nuclei. The endoplasmic reticulum, i. e., the sarcoplasmic reticulum of the muscle fibres are the storehouse of calcium ions.
APPEARS IN
संबंधित प्रश्न
Draw the diagram of a sarcomere of skeletal muscle showing different regions.
Define sliding filament theory of muscle contraction.
Write true or false. If false, change the statement so that it is true:
Actin is present in thin filament
Write true or false. If false, change the statement so that it is true:
H-zone of striated muscle fibre represents both thick and thin filaments.
Write the differences between Actin and Myosin.
Write the difference between:
Red and White muscles
How do you distinguish between a skeletal muscle and a cardiac muscle?
Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely ______ and ______.
Read the following statements.
- Bands are dark bands and contain myosin
- I bands are light bands and contain actin
- During muscle contraction, the A band contracts.
- The part between the two Z - lines is called a sarcomere.
- The central part of the thin filament, not overlapped by the thick filament is called Hzone.
Of the above statements
In a skeletal muscle, bundles of muscle fibres are held together by ______.
Which of the following statements wrongly represents the nature of smooth muscle?
Match the following and mark the correct option
| Column I | Column II |
| A. Fast muscle fibres | i. Myoglobin |
| B. Slow muscle fibres | ii. Lactic acid |
| C. Actin filament | iii. Contractile unit |
| D. Sarcomere | iv. I-band |
Which one of the following statement is incorrect?
Muscles with characteristic striations and involuntary are ______.
