NSCA CSCS EXAM REVIEW Questions and answers, 100% Accurate, rated A+

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NSCA CSCS EXAM REVIEW Questions and answers, 100% Accurate, rated A+ Which of the following substances regulates muscle actions? potassium calcium troponin tropomyosin - ✔✔-calcium Which o... f the following substances acts at the NMJ to excite the muscle fibers of a motor unit? acetylcholine ATP creatine phosphate serotonin - ✔✔-acetylcholine 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? golgi tendon organ muscle spindle extrafusal muscle pacinian corpuscle - ✔✔-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 - ✔✔-SA node Which of the following occurs during the QRS complex of a typical ECG? 1. depolarization of the atrium 2. repolarization of the atrium 3. repolarization of the ventricle 4. depolarization of the ventricle a. 1 and 3 only b. 2 and 4 only c. 1, 2, and 3 only d. 2, 3, and 4 only - ✔✔-b. 2 and 4 only Which of the following is the definition of power? mass x acceleration force x distance force x velocity torque x time - ✔✔-force x velocity To compare performances of Olympic weightlifters of different body weights, the classic formula divides the load lifted by the athlete's body weight body weight squared lean body weight body weight to the two-thirds power - ✔✔-body weight to the two-thirds power During a free weight exercise, muscle force varies with which of the following? 1. perpendicular distance from the weight to the body joint 2. joint angle 3. movement acceleration 4. movement velocity squared a. 1 and 2 only b. 1 and 4 only c. 1, 2, and 3 only d. 2, 3, and 4 only - ✔✔-a. 1 and 2 only (perpendicular distance from the weight to the body joint AND joint angle) A vertical jump involves knee, hip, and shoulder movement primarily in which of the following anatomical planes? sagittal perpendicular frontal transverse - ✔✔-sagittal An athlete is performing a concentric isokinetic elbow flexion and extension exercise. Which of the following type(s) of lever occur(s) at the elbow during this exercise? 1. 1st class 2. 2nd class 3. 3rd class a. 1 only b. 2 only c. 1 and 3 only d. 2 and 3 only - ✔✔-c. 1 and 3 only Which of the following substances can be metabolized anaerobically? glycerol glucose amino acids free fatty acids - ✔✔-glucose Which of the following reactions is the primary cause of metabolic acidosis (decrease in intramuscular pH during high-intensity, fatiguing exercise)? ATP = ADP + Pi + H+ pyruvate + NADH = lactate + NAD+ ADP + creatine phosphate = ATP + creatine fructose-6-phosphate = fructose-1,6-biphosphate - ✔✔-ATP = ADP + Pi + H+ Which of the following energy systems produces ATP at the quickest rate? phosphagen aerobic glycolysis fat oxidation fast glycolysis - ✔✔-phosphagen Approximately how many net ATP are produced via the oxidative energy system from the metabolism of one molecule? 27 34 38 41 - ✔✔-38 Which of the following energy substrates cannot be depleted during extreme exercise intensities or durations? creatine phosphate glycogen water ATP - ✔✔-ATP After a bout of resistance training, acute hormonal secretions provide all of the following information to the body EXCEPT amount of physiological stress metabolic demands of exercise type of physiological stress energy expended - ✔✔-energy expended Which of the following hormones enhance(s) muscle tissue growth? 1. growth hormone 2. cortisol 3. IGF-1 4. progesterone a. 1 and 3 only b. 2 and 4 only c. 1, 2, and 3 only d. 2, 3, and 4 only - ✔✔-a. 1 and 3 only Which of the following is NOT a function of growth hormone? increase lipolysis decrease collagen synthesis increase amino acid transport decrease glucose regulation - ✔✔-decrease collagen synthesis Which of the following hormones has the greatest influence on neural change? growth hormone testosterone cortisol IGF - ✔✔-testosterone What type of resistance training workout promotes the highest growth hormone increases following the exercise session? a. 30s rest, high volume, 3 sets b. 30s rest, low volume, 1 set c. 3 min rest, high volume, 1 set d. 3 min rest, low volume, 3 sets - ✔✔-a. 30s rest, high volume, 3 sets Following resistance training, augmented neural drive to the working musculature is the result of 1. increased agonist muscle recruitment 2. muscle hypertrophy 3. improved firing rate 4. greater synchronization a. all of the above b. 1 and 4 only c. 1, 2, and 3 only d. 1, 3, and 4 only - ✔✔-d. 1, 3, and 4 only When one is performing a box-to-box plyometric drop jump, in order to generate sufficient force in a limited amount of time (<200 ms), which muscle fibers are bypassed through the principle of selective recruitment? I IIa IIx IIc - ✔✔-I Which of the following performance or physiological characteristics is NOT usually observed in a state of nonfunctional overreaching (NFOR) within athlete populations? stagnation and a decrease in performance hormonal disturbances sleep disturbances increased levels of fatigue - ✔✔-sleep disturbances Following prolonged periods of detraining in elite strength/power athletes, which of the following physical characteristics will likely show the largest reduction as a consequence of the removal of an anaerobic training stimulus? total fat mass fast-twitch fiber CSA slow-twitch fiber CSA total Type I muscle fiber content - ✔✔-fast-twitch fiber CSA Following a period of chronic high-intensity resistance training, a variety of physiological adaptations take place in a number of systems within the body that promote improved athletic performance in strength/power activities. If an elite athlete were to undergo 12 weeks of heavy strength training, which of the following adaptations would NOT be expected consequent to this type of anaerobic exercise? transition from Type IIx to Type IIa muscle fiber increased pennation angle in certain muscle groups reduced SR and T-tubule density elevated NA-K ATPase activity - ✔✔-reduced SR and T-tubule density In which of the following athletes might you expect limited bone mineral density (BMD) levels as a consequence of the force vectors and the physical demands associated with the given sport? 16 year old gymnast with a seven-year training history in her sport a 23 year old offensive lineman who has lifted weights for eight-years a 22 year old track cyclist who has a 1RM of 352lbs a 19 year old 800m freestyle swimmer with one year of dryland training - ✔✔-a 19 year old 800m freestyle swimmer with one year of dryland training A 17 year old high school cross-country runner has been training aerobically for six months in preparation for the upcoming season. Which of the following adaptations will occur in the muscles during that time? increased concentration of glycolytic enzymes hyperplasia of Type II fibers transformation from Type I to Type II fibers hypertrophy of Type 1 fibers - ✔✔-hypertrophy of Type I fibers The amount of blood ejected from the left ventricle during each beat is the cardiac output a-v O2 difference heart rate stroke volume - ✔✔-stroke volume Which of the following does NOT normally increase during an aerobic exercise session? end-diastolic volume cardiac contractility cardiac output diastolic blood pressure - ✔✔-diastolic blood pressure The mean arterial pressure is defines as the average blood pressure throughout the cardiac cycle average of the systolic and diastolic blood pressures average systolic blood pressure during exericse average of blood pressure and heart rate - ✔✔-average blood pressure throughout the cardiac cycle Primary training adaptations of elite aerobically trained athletes include which of the following? 1. increased maximal oxygen uptake 2. decreased blood lactate concentration 3. increased running economy 4. decreased capillary density a. 1 and 3 only b. 2 and 4 only c. 1, 2, and 3 only d. 2, 3, and 4 only - ✔✔-c. 1, 2, and 3 onl [Show More]

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