Q. No.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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During muscle contraction, when the myosin head releases ADP and iP it:
1. forms cross bridge with actin
2. pulls actin towards M-line
3. goes back to its relaxed state
4. gets detached from the cross bridge
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Which of the following masks the active sites on actin when a skeletal muscle is relaxed?
| 1. | Tropomyosin | 2. | Troponin |
| 3. | Calmodulin | 4. | Ubiquitin |
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The total number of vertebrosternal and vertebrochondral ribs in human body respectively are:
| 1. | 7 and 3 | 2. | 14 and 6 |
| 3. | 3 and 7 | 4. | 6 and 14 |
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A flat bone present on the ventral midline of thorax is called as:
| 1. | Hyoid | 2. | Clavicle |
| 3. | Sternum | 4. | Vertebral body |
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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 joint between atlas and axis vertebra is classified as:
| 1. | Saddle joint | 2. | Pivot joint |
| 3. | Gliding joint | 4. | Hinge joint |
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