- 1(current)
Q. No.The membranous connective tissue closest to the individual muscle fiber in a skeletal muscle is called as:
| 1. | aponeurosis | 2. | epimysium |
| 3. | perimysium | 4. | endomysium |
The extensions of the cell membrane that penetrate into the centre of skeletal and cardiac muscle cells are called as:
| 1. | transverse tubule system | 2. | sarcoplasmic reticulum |
| 3. | myofibrils | 4. | terminal cisternae |
Identify the correct statement regarding the comparison of skeletal and smooth muscle:
1. Nervous stimulation of smooth muscle is always excitatory, whereas nervous stimulation of skeletal muscle may be excitatory or inhibitory.
2. The contractile activity of smooth muscle may be affected by hormones, whereas the contractile activity of the skeletal muscle is not.
3. Both ANS and somatic neural systems innervate smooth muscle, whereas skeletal muscle may be innervated by the somatic motor system only.
4. The calcium-binding protein in smooth muscle is troponin whereas in skeletal muscle, it is tropomyosin.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Within the A-band of a sarcomere is a paler region called the H-zone. |
| Reason (R): | H-zone is the zone of the thin myofilaments in the center of the A band. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- 1(current)
Q. No.
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