CSCS 423 Practice Exam Questions with 100% Correct Answers | Verified | Updated 2024|76 Pages
1. To which of the following structures do the cross-bridges attach during muscle action? a. actin b. myosin c. M-bridge d. sarcolemma - ️️actin 2. Which of the following substances regulates muscle actions? a. potassium b. calcium c. troponin d. tropomyosin - ️️calcium 3. Which of the following substances acts at the neuromuscular junction to excite the muscle fibers of a motor unit? a. acetylcholine b. ATP c. creatine phosphate d. serotonin - ️️acetylchooline
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