Q. No.Overlap between actin and myosin myofilaments in a sarcomere is seen in:?
1. A band
2. H zone
3. I band
4. M line
1. A band
2. H zone
3. I band
4. M line
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The drug curare causes:
1. flaccid paralysis.
2. spastic paralysis.
3. smooth muscle degeneration.
4. cardiac failure.
A motor unit is
| 1. | all the muscle fibers innervated by all the motor neurons in a muscle. |
| 2. | all the fibers in one fasciculus. |
| 3. | all the muscle fibers innervated by a single motor neuron in a muscle. |
| 4. | all the motor neurons that innervate one muscle fiber in a muscle. |
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A type of strength training in which the joint angle and muscle length do not change during contraction is termed as:
1. isometric contraction.
2. isotonic contraction.
3. concentric contraction.
4. eccentric contraction.
With respect to slow twitch [Type I] fibers the fast-twitch [Type II] muscle fibers are:
1. More resistant to fatigue.
2. Supplied by more more blood vessels.
3. Having Larger amount of stored glycogen.
4. Having more mitochondria.
In smooth muscle contraction:
| 1. | Calcium ions bind to troponin C. |
| 2. | Myosin has no role. |
| 3. | Troponin and tropomyosin are moved. |
| 4. | Calcium ions bind to calmodulin, which activates an enzyme. |
The joint between skull bones is classified as:
| 1. | cartilaginous | 2. | fibrous |
| 3. | epithelial | 4. | synovial |
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The joint between two pubic bones is called as:
1. syndesmosis
2. gomphosis
3. symphysis
4. synchondrosis
Matecarpophalangeal joint is a:
1. condyloid joint
2. pivot joint
3. saddle joint
4. gliding joint
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