Q. No.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
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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1. poliomyelitis
2. myasthenia gravis
3. multiple sclerosis
4. muscular dystrophy
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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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During muscle contraction, the event shown in the following diagram describes:
1. cross bridge detachment
2. the power stroke or working stroke
3. cross bridge formation
4. cocking of myosin head
The pubic bones, constituent of the coxal bone, are held together ventrally by a:
1. syndesmosis
2. diarthrotic
3. symphysis
4. synchondrosis
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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Progressive degeneration of skeletal muscle mostly due to genetic disorder is called:
| 1. | Myasthenia gravis | 2. | Muscular dystrophy |
| 3. | Poliomyelitis | 4. | Muscle hyperplasia |
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An example of a fibrous joint ‘gomphosis’ in the human body is:
| 1. | humerus-ulna | 2. | femur-innominate |
| 3. | tooth-alveolus | 4. | mandible-temporal |
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