1.Which of the following substances regulates muscle actions ANS Calcium
2.Which of the following substances acts as the neuromuscular junction to excite the
muscle fibers of a motor unit? ANS acetylcholine
3.When throwing a baseball, an athlete's arm is rapidly stretched just before throwing the
ball. Which of the following structures detects and responds to that stretch by reflexively
increasing muscle activity? ANS muscle spindle
4.From which of the following is the hearts electrical impulse normally initiated? ANS SA
node
5.Which of the following occurs during the QRS complex of a typical ECG? ANS
repolarization of the atrium and depolarization of the ventricle
6.Which of the following is the definition of power? ANS force x velocity
7.To compare performances of Olympic weightlifters of different body weights, the classic
formula divides the load lifted by the athlete's ANS Body weight to the 2/3 power
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, ESSENTIALS OF STRENGTH TRAINING AND CONDITIONING EXAM STUDY GUIDE
8.During a free weight exercise, muscle force varies with which of the following? ANS
perpendicular distance from the weight to the body joint and movement acceleration
9.Vertical jump involves knee, hip, and shoulder movement primarily in which of the
following anatomical planes? ANS sagittal
10. An athlete is performing a concentric isokinetic elbow flexion and extension exercise.
Which of the following type(s) of levers occur(s) at the elbow during this exercise? ANS
First class and third class
11. Which of the following substances can be metabolized in anaerobically? ANS glucose
12. Which of the following reactions is the primary cause of metabolic acidosis (i.e., the
decrease an intramuscular pH during high-intensity, fatiguing exercise)? ANS ATP —>
ADP + P + H
13. Which of the following energy systems produces ATP at the quickest rate? ANS
phosphagen
14. Approximately how many net ATP are produced via the oxidative energy system from
the metabolism of one glucose molecule?? ANS 38
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