Question at position 38 Why is the regulation of calcium in the sarcoplasm important for muscle function?To enhance the muscle's ability to relaxTo increase the availability of oxygen to the muscle fibersTo prevent muscle contraction from becoming too slowTo avoid abnormal muscle contraction

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Examining why calcium regulation in the sarcoplasm matters for muscle function requires distinguishing what calcium does in muscle cells.
Option 1: 'To enhance the muscle's ability to relax' — Calcium in the cytoplasm promotes contraction, and relaxation depends on removing Ca2+ from the cytoplasm. While proper calcium handling enables relaxation, saying it 'enhances relaxation' is an indirect and incomplete description of the primary role of calcium regulation, which is more about controlling contraction cycles rather than simply relaxing.
Option 2: 'To increase the availability of oxygen to the muscle fibers' — Oxygen delivery is governed by circulation and metabolic pathways, not by calcium levels in the sarcoplasm. This statement misattributes the function of calcium regulation to oxygen supply, making it inaccurate.
Option 3: 'To prevent muscle contraction from becoming too slow' — Calcium release drives the contraction process and influences contraction speed, so regulating calcium is not aimed at preventing slower contractions; if anything, abnormal calcium handling can cause irregular or excessive activity, not a general slowing you’d target to prevent.
Option 4: 'To avoid abnormal muscle contraction' — This option highlights the potential consequence of dysregulated calcium signaling: erratic, uncoordinated, or sustained contractions (such as cramps or tetany). Proper regulation prevents these abnormal contractions and ensures smooth, controlled muscle activity.

Question at position 38 Why is the regulation of calcium in the sarcoplasm important for muscle function?To enhance the muscle's ability to relaxTo increase the availability of oxygen to the muscle fibersTo prevent muscle contraction from becoming too slowTo avoid abnormal muscle contraction

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Question at position 38 Why is the regulation of calcium in the sarcoplasm important for muscle function?To enhance the muscle's ability to relaxTo increase the availability of oxygen to the muscle fibersTo prevent muscle contraction from becoming too slowTo avoid abnormal muscle contraction

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Similar Questions

Antagonists muscle group: A to B: EJ __extenders __ B to A: EJ __ extenders __ Antagonists are passively __ lengthening __ from A to B and passively __shortening __ from B to A.

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