NEET 2023 Zoology Muscular System Multiple Correct Question

To provide a comprehensive explanation for the question regarding skeletal muscle, we first need to clarify the assumptions underlying the question and analyze the options given. Although the information provided lacks the specific statements A, B, C, and D, we can still construct a general framework to understand skeletal muscle and identify which characteristics are commonly attributed to it.

Explanation of Skeletal Muscle

Skeletal muscle is a type of striated muscle tissue that is under voluntary control. It is primarily responsible for the movement of bones and is attached to the skeleton. Key characteristics of skeletal muscle include:

1. Striated Appearance: Skeletal muscle fibers have a banded appearance due to the arrangement of actin and myosin filaments.
2. Multinucleated Cells: Unlike smooth or cardiac muscle, skeletal muscle fibers are multinucleated, meaning they contain multiple nuclei per cell.
3. Voluntary Control: Skeletal muscles are controlled consciously, allowing for movement and posture maintenance.
4. Quick Contraction: Skeletal muscles can contract rapidly, making them suitable for quick movements and bursts of speed.

Analyzing the Options

Let's analyze the options based on the typical characteristics of skeletal muscle:

• Option A (B and C only): This option states that statements B and C are correct. If B and C refer to true characteristics of skeletal muscle, then this option could be valid if A is incorrect.

• Option B (A, C and D only): This option suggests that A, C, and D all represent correct attributes. If any of these statements contradict the known characteristics of skeletal muscle, this option would be incorrect.

• Option C (C and D only): This option implies that only statements C and D are true. If either A or B is also true, then this option would be incorrect.

• Option D (A, B and C only): This option claims that all three statements A, B, and C are correct. If all three are accurate representations of skeletal muscle characteristics, then this would be the correct choice.

Correct Answer Explanation

Given that the correct answer is stated as A (not D), we must assume that only statements B and C correctly describe skeletal muscle while A is potentially misleading or incorrect.

Thus:

• If A suggests something inaccurate about skeletal muscle (e.g., it is involuntary, or has fewer nuclei), then Option D would be incorrect, and Option A could be correct if it only includes B and C.

Why Other Options Are Incorrect

• Option B is incorrect if either statement A is false or if it includes statements that misrepresent skeletal muscle.
• Option C could be incorrect if either C or D is not a valid characteristic of skeletal muscle.
• Option D is incorrect if A contains inaccuracies.

Conclusion

To conclude, the correct answer being A suggests that only statements B and C are true representations of skeletal muscle characteristics. The evaluation of each option based on the characteristics of skeletal muscle allows us to understand why A is the correct choice while the others are not. For a definitive analysis, the specific statements A, B, C, and D would need to be reviewed to confirm their validity.

In summary, always focus on the fundamental characteristics of skeletal muscle to determine the accuracy of statements regarding it.