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प्रश्न
How do you distinguish between a skeletal muscle and a cardiac muscle?
उत्तर
| Skeletal muscle | Cardiac muscle | |
| 1. | They are found in the limbs, body walls, tongue, pharynx, and the beginning of the oesophagus. | They are present in the heart's wall, pulmonary veins, and superior vena cava. |
| 2. | Fibres unbranched. | Fibres branched. |
| 3. | Light and dark brands are present. | Faint light and dark bands are present. |
| 4. | Multinucleate | Uninucleate |
| 5. | Nerve supply through the central nervous system. | Nerve supply from the brain and the automated nervous system. |
| 6. | No oblique bridges or intercalated discs. | No oblique bridges or intercalated discs. |
| 7. | They quickly become weary. | They never become weary. |
| 8. | Extremely fast contraction. | Rapid contraction. |
| 9. | Voluntary | Involuntary |
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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 difference between:
Red and White muscles
Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely ______ and ______.
In a muscle fibre Ca++ is stored in ______.
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
Myoglobin occurs in
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 ______.
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?
