When a muscle is at rest, Ca++ ions are concentrated within the spaces of the

actin filaments

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myosin filaments

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Z lines

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sarcoplasmic reticulum

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Solution

The correct option is D
sarcoplasmic reticulum

When a muscle is at rest, Ca++ ions are concentrated within the spaces of the sarcoplasmic reticulum (endoplasmic reticulum)

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Similar questions

During muscle contraction, Ca++ ions bind to

(C a^{+ +})

C a^{+ +}

^{2 +}

C a^{2 +}

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