Which of the following statements about visceral muscles is correct?
(1) They are non-striated muscles (smooth muscles)
(2) They are involuntary muscles
(3) They have various functions
(4) All are correct
| 1. | Are multinucleate and under voluntary control |
| 2. | Lack striations and contract slowly |
| 3. | Show branched fibres with intercalated discs and involuntary activity |
| 4. | Are non-contractile and supportive in nature |
| Assertion (A): | Smooth muscles are found in the walls of internal organs such as the stomach and intestines. |
| Reason (R): | Smooth muscles are striated and voluntary. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
| Assertion (A): | Skeletal muscle fibres appear striated. |
| Reason (R): | They possess light and dark bands of contractile proteins actin and myosin. |
| 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. |
Cardiac/head muscles are:
(1) Striated and involuntary
(2) Branched
(3) Not fatigued
(4) All are correct