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  • Assertion (A): Skeletal muscle fibers form a syncytium due to the presence of multiple nuclei in the sarcoplasm. Reason (R): T

Assertion (A): Skeletal muscle fibers form a syncytium due to the presence of multiple nuclei in the sarcoplasm.

Reason (R): The sarcoplasmic reticulum of the muscle fiber functions as a reservoir for calcium ions.

Option: 1

Both (A) and (R) are true, and (R) correctly explains (A).


Option: 2

Both (A) and (R) are true, but (R) does not adequately explain (A).


Option: 3

(A) is a true statement, while (R) is false.


Option: 4

Both (A) and (R) are false.


Answers (1)

best_answer

The assertion (A) is true that skeletal muscle fibers form a syncytium due to the presence of multiple nuclei in the sarcoplasm. The fusion of myoblasts during development results in the multinucleated structure of skeletal muscle fibers.

The reason (R) is also true is that the sarcoplasmic reticulum functions as a reservoir for calcium ions. However, it does not directly explain why skeletal muscle fibers form a syncytium. The presence of multiple nuclei in the sarcoplasm is primarily responsible for the syncytial nature of skeletal muscle fibers.

Therefore, while both statements are true but reason (R) does not adequately explain assertion (A), making option 2 the correct answer.

Posted by

Deependra Verma

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