Q. No.All the following are parts of the actin myofilament in a sarcomere except:
1. actin
2. cisternae
3. tropomyosin
4. troponin
1. actin
2. cisternae
3. tropomyosin
4. troponin
An ATPase activity is associated with:
1. G actin molecule
2. head of myosin molecule
3. troponin molecule
4. F actin
Overlap between actin and myosin myofilaments in a sarcomere is seen in:?
1. A band
2. H zone
3. I band
4. M line
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. |
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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