CSCS Practice Exam Study Test Bank Questions

CSCS Practice Exam Study Test Bank Questions with Complete Solutions

• To which of the following structures do the cross-bridges attach during muscle action?
• actin
• myosin
• M-bridge
• sarcolemma - Correct Answer actin
• Which of the following substances regulates muscle actions?
• potassium
• calcium
• troponin
• tropomyosin - Correct Answer calcium
• Which of the following substances acts at the neuromuscular junction to excite the muscle fibers of a

motor unit?

• acetylcholine
• ATP
• creatine phosphate
• serotonin - Correct Answer acetylchooline
• Which of the following muscle fiber types is the MOST beneficial for a marathon runner?
• Type I
• Type IIa
• Type IIx 1 / 4

• Type IIc - Correct Answer Type I
• 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?

• Golgi tendon organ
• muscle spindle
• extrafusal muscle
• Pacinian corpuscle - Correct Answer Muscle spindle
• From which of the following is the heart's electrical impulse normally initiated?
• AV node
• SA node
• the brain
• the sympathetic nervous system - Correct Answer SA node
• Which of the following occurs during the QRS complex of a typical ECG?
• depolarization of the atrium

II. repolarization of the atrium III. repolarization of the ventricle IV. depolarization of the ventricle

• I and III only
• II and IV only
• I, II, and III only
• II, III, and IV only - Correct Answer Repolarization of the atrium; depolarization of the ventricle (II and

IV only) 2 / 4

• Which of the following is the ultimate source of energy for a muscular contraction?
• GTP
• oxygen
• NADH
• ATP - Correct Answer ATP
• Which of the following substances can be metabolized anaerobically?
• protein
• carbohydrate
• fat
• glycerol - Correct Answer carbohydrate
• The predominant energy system used during a training session depends primarily on the
• session intensity.
• session duration.
• athlete's training status.
• athlete's lean body mass. - Correct Answer Session intensity
• The production of lactic acid results from the activation of which of the following energy systems?
• phosphagen
• slow glycolysis
• fast glycolysis
• fat oxidation - Correct Answer Fast glycolysis
• Which of the following energy systems has the highest rate of energy production? 3 / 4

• phosphagen
• fast glycolysis
• fat oxidation
• carbohydrate oxidation - Correct Answer phosphagen
• Approximately how many ATP are produced via the oxidative energy system from the degradation of

one glucose molecule?

• 27
• 36
• 38
• 41 - Correct Answer 38
• Which of the following energy systems is predominantly active at the initiation of all exercise?
• oxidative
• phosphagen
• slow glycolysis
• fast glycolysis - Correct Answer phosphagen
• Which of the following enzymes catalyzes the rate-limiting step of glycolysis?
• PFK
• isocitrate dehydrogenase
• phosphorylase
• lactate dehydrogenase - Correct Answer PFK
• / 4