Which of the following statements about ...

Which of the following statements about the mechanism of muscle contraction are correct ?
(i) Acetylcholine is released when the neural signal reaches the motor end plate.
(ii) Muscle contraction is initiated by a signal sent by CNS via sensory neuron.
(iii) During muscle contraction, isotropic band gets elongated
(iv) Repeated activation of the muscles can lead to lactic acid accumulation.

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Which of the following statements is/are correct? (i) During muscle contraction, isotropic band gets elongated. (ii). Acetylcholine is released when the neural signal reaches the motor end plate. (iii) Muscle contraction is initiated by the signal sent by CNS via a sensory neuron. (iv) Repeated activation of muscle can lead to lactic acid accumulation.

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Match the following and mark the correct option {:("Column I", " ""Column II"),("Fast muscle fibres",i."Myoglobin"),("Slow muscle fibres",ii."Lactic acid"),("Actin filament",iii."Contractile unit"),("Sarcomere",iv. "I-band"):}

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