Assertion: Smooth muscle fibres do not appear to be striated.
Reason: Striation occurs due to the regular alternate arrangement of thick and thin filaments in the smooth muscle fibre.

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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If both Assertion and Reason are correct, but Reason is not correct explanation of Assertion.

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If Assertion is correct but Reason is incorrect.

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If Assertion is incorrect but Reason is correct.

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Solution

The correct option is C If Assertion is correct but Reason is incorrect.
Smooth muscle fibres are involuntary and non – striated.

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Assertion: Smooth muscle fibres do not appear to be striated.
Reason: Striation occurs due to the regular alternate arrangement of thick and thin filaments in the smooth muscle fibre.

Q. Assertion :Smooth muscle fibres do not appear to be striated. Reason: This is due to regular alternate arrangement of thick and thin filaments is smooth muscle fibre.

Q. State whether the following statements are true or false.
H-zone of striated muscle fibre represents both thick and thin filaments.

Q. Smooth muscle fibres
I. are fusiform & uninucleated cells
II. Are involuntary in function
III. Do not perform slow and sustained contractions
IV. Do not show striations due to regular arrangement of actin and myosin filaments.
Choose the incorrect set of statements.

Q. Uninucleated muscle fibres are found in
(a) Cardiac muscles
(b) Striated muscles
(c) Smooth muscles

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Assertion: Smooth muscle fibres do not appear to be striated. Reason: Striation occurs due to the regular alternate arrangement of thick and thin filaments in the smooth muscle fibre.

The correct option is C If Assertion is correct but Reason is incorrect.Smooth muscle fibres are involuntary and non – striated.

Assertion: Smooth muscle fibres do not appear to be striated.
Reason: Striation occurs due to the regular alternate arrangement of thick and thin filaments in the smooth muscle fibre.

The correct option is C If Assertion is correct but Reason is incorrect.
Smooth muscle fibres are involuntary and non – striated.