NSCA Test Questions & Answers (Chapter 1, 2, 4, 5, 6, 10) | 70 Questions with 100% Correct Answers | Updated & Verified
To which of the following structures do the cross-bridges attach during muscle action? - ANS - Actin When throwing a baseball, an athlete's arm is rapidly stretched just prior to throwing the ball. Which of the following structures detects and responds to that stretch by reflexively increasing muscle activity? - ANS - Muscle spindle Which of the occurs during the QRS complex of a typical ECG? i. Depolarization of the atrium ii. Repolarization of the atrium Iii. Repolarization of the ventricle Iv. Depolarization of the ventricle - ANS - ii & iv only
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