- 1(current)
Q. No.During muscle contraction, the part that does not get shortened in length is labeled as the letter:
| 1. A | 2. B |
| 3. C | 4. D |
Subtopic: Â Excitation Contraction Coupling I |Â Excitation Contraction Coupling II |
 69%
Level 2: 60%+
Hints
What happens during the contraction of a skeletal muscle fiber?
| 1. | The myosin filaments stay the same size but the actin filaments shorten |
| 2. | The sarcomeres shorten |
| 3. | The actin filaments stay the same size but the myosin filaments shorten |
| 4. | Both actin and myosin filaments shorten |
Subtopic: Â Excitation Contraction Coupling I |
 68%
Level 2: 60%+
Hints
Consider the following two statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
| I: | Repeated activation of muscles can lead to fatigue. |
| II: | Repeated activation of muscles can lead to accumulation of lactic acid. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
Subtopic: Â Excitation Contraction Coupling I |
 88%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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