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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类似问题

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.

Question1.20 Which of the following does NOT directly impact force production potential of a muscle? Muscle volume Muscle fibre type Neural recruitment frequency Muscle fibre Pinnation Muscle length ResetMaximum marks: 1 Flag question undefined

Stretching exercises are designed to lengthen the muscle tissue and help it relax to its normal resting state.

What molecular event terminates muscle contraction in skeletal muscle?

Which of the following best describes the function of the sarcoplasmic reticulum in skeletal muscle fibers?

Muscle tissue has all of the following properties except ________.

Question at position 65 Skeletal muscle is considered voluntary because it cannot perform actions subconsciously.TrueFalse

Question at position 55 Which property of muscle tissue enables it to respond to a stimulus, such as a hormone or motor neuron signal?ContractilityElasticityExcitabilityExtensibility

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希望你的学习变得更简单

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.