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Non-segmentation allows for evolutionary innovation in body form
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Non-segmentation allows for evolutionary innovation in body form

User Ilya Sulimanov
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Answer:

During excitation-contraction coupling, calcium ion concentration is highest in the:

sarcoplasmic reticulum.

terminal cisterna.

cytosol of the muscle fiber.

sarcolemma.

Step-by-step explanation:

User Ethan Selzer
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