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CSCS Chapter Reivew

Review questions at the end of each chapter from the 4th edition textbook

QuestionAnswer
Which substance regulates muscle actions? Calcium
Which substance acts at the neuromuscular junction to excite muscle fibers of a motor unit? Acetylcholine
When throwing a baseball, an athlete’s arm is stretched. Which structure detects and responds to that stretch by reflexively increasing muscle activity? muscle spindle
From where is the heart’s electrical impulse normally initiated? SA node
What occurs during the QRS complex of a typical ECG? repolarization of the atrium
Created by: DBLthreat
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