Q. No.
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Skeletal muscles are:
1. Striated, Multinucleate and Voluntary
2. Non-Striated, Multinucleate and Voluntary
3. Striated, Multinucleate and Involuntary
4. Non-Striated, Uni-nucleate and Voluntary
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With respect to the red muscle fibers [Type I], the white muscle fibers [Type II] are richer in:
| 1. | Blood capillaries | 2. | Myoglobin |
| 3. | Sarcoplasmic reticulum | 4. | Mitochondria |
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The smallest, functional unit of contraction is the:
| 1. | muscle fiber | 2. | sarcomere |
| 3. | myofilament | 4. | myofibril |
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A motor neuron along with all the muscle fibers innervated by it constitute a:
| 1. Fascicle | 2. Motor end plate |
| 3. Motor unit | 4. Myoneural junction |
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As the distance from Z line to Z line decreases, which bands shorten in a sarcomere?
| 1. | the I band and H band | 2. | the I band and A band |
| 3. | the A band and H band | 4. | all bands shorten |
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All the following regarding red muscle fibers are true except:
1. They are adapted for slow and sustained activity
2. They have a high content of myoglobin
3. They are rich in mitochondria
4. They depend on anaerobic process for energy
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The central part of the thick filaments not overlapped by the thin filaments is called as:
| 1. | A band | 2. | I band |
| 3. | H zone | 4. | Sarcomere |
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During relaxation of a skeletal muscle:
| 1. | Calcium ions that are bound to troponin C now bind to troponin A |
| 2. | Cross bridge formation between myosin head and actin takes place |
| 3. | The A band of the sarcomere lengthens |
| 4. | Calcium ions are pumped back to the sarcoplasmic cisternae |
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What type of muscles do you expect to find in the inner walls of hollow visceral organs?
| 1. | Involuntary, nonstriated | 2. | Voluntary, nonstriated |
| 3. | Involuntary, striated | 4. | Voluntary, striated |
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