Calcium deficiency can have a significant impact on muscle contraction because calcium

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initiates the depolarisation of sarcolemma at the neuromuscular junction

inhibits the hydrolysis of ATP by the heads of myosin of thick filaments

binds to troponin, uncovering the active sites on actin for myosin interaction

enhances the elasticity of muscle fibres allowing them for efficient stretching

answer is C.

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Detailed Solution

Calcium deficiency can have a significant impact on muscle contraction because calcium binds to troponin, uncovering the active sites on actin for myosin interaction. Muscle contraction continues till the Ca⁺⁺ ions are pumped back to the sarcoplasmic cisternae resulting in the masking of actin filaments.

Calcium deficiency can lead to muscle weakness, cramps, and reduced muscle tone as it disrupts the normal regulation of muscle contraction.

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