All or none law is not applicable for

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Whole skeletal muscle

Single skeletal muscle fibre

Whole cardiac muscle

Single smooth muscle fibre

answer is A.

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Detailed Solution

Concept: The “All or none law” is not applicable for the muscle which is a form of striated muscle tissue that is under the voluntary control of the somatic nervous system.
A whole skeletal muscle is defined as an organ belonging to the muscular system. Each organ or muscle consists of skeletal, connective, nerve, and blood or vascular tissue. The skeletal muscles vary considerably in size, shape, and arrangement of fibres. It is appropriate for the entire skeletal muscle, not a single muscle fibre.
Therefore, the all or none law is not applicable for the whole skeletal muscle.
Hence, the correct answer is option 1.

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Best Online Course for CBSE