Q. No.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
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
Which of the following masks the active sites on actin when a skeletal muscle is relaxed?
| 1. | Tropomyosin | 2. | Troponin |
| 3. | Calmodulin | 4. | Ubiquitin |
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 |
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 |
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 |
A flat bone present on the ventral midline of thorax is called as:
| 1. | Hyoid | 2. | Clavicle |
| 3. | Sternum | 4. | Vertebral body |
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 |
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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