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Question

Asserion(A): At cellular level, muscle fibres contract and show appropriate response on receiving impulses. 

Reason(R): Muscle fibres contract because of change of structure of muscle proteins at cellular level.



A

A & R both incorrect

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B

A is correct, R is incorrect

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C

A & R both are correct

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D

A is incorrect & R is correct

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Solution

The correct option is B

A & R both are correct


On receiving the electrical impulse, proteins of muscle fibres alter their structure temporarily . When all muscle fibres and their corresponding proteins show similar effect, an overall response is created in the muscle tissue as a whole which is visible as contraction of muscle tissue.


Biology

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