NSCA-CSCS Exam Prep, Questions and answers, 100% Accurate, rated A+

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NSCA-CSCS Exam Prep, Questions and answers, 100% Accurate, rated A+ The pelvis is located _______________ to the patella. - ✔✔-superior Which of the following is the smallest contractile unit ... of skeletal muscle? myosin epimysium sarcolemma sarcomere - ✔✔-sarcomere Which of the following describes Type I muscle fibers? rapid force development capabilities fatigue resistant with high aerobic energy supply inefficient and easily fatigable high myosin ATPase activity - ✔✔-fatigue resistant with high aerobic energy supply Which of the following describes the flow of blood? - ✔✔-right atrium, right ventricle, lungs, left atrium, left ventricle, body On average, how many times per minute does the SA node discharge at rest? - ✔✔-60-80 Which of the following are the two main divisions of the skeletal system? - ✔✔-appendicular and axial Some of the highest bone mineral densities have been seen in which of the following types of athletes? - ✔✔-gymnasts What joint comprises the ankle and wrist joints? - ✔✔-biaxial Which of the following is the order of the phases of a muscle contraction? - ✔✔-resting, excitationcontraction coupling, contraction, recharge, relaxation The chronotropic effect is caused by stimulation of the _______________ nervous system and causes the heart rate to _______________. - ✔✔-sympathetic; increase Which of the following substances regulates muscle actions? - ✔✔-Calcium Which of the following substances acts as the neuromuscular junction to excite the muscle fibers of a motor unit? - ✔✔-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? - ✔✔-Muscle Spindle From which of the following is the heart's electrical impulse normally initiated? - ✔✔-SA node Which of the following occurs during the QRS complex of a typical ECG? Depolarization of the Atrium Repolarization of the Atrium Repolarization of the Ventricle Depolarization of the Ventricle - ✔✔-Depolarization of the Atrium Repolarization of the Ventricle The Krebs cycle occurs in which portion of the cell? - ✔✔-mitochondria The law of mass action states which of the following? The rate of product formation is greatly influenced by the concentrations of the reactants. The concentrations of reactants or products will drive the direction of the reactions. A stronger action potential cannot produce a stronger contraction. The weight or mass of an object creates a stronger action potential. - ✔✔-The concentrations of reactants or products will drive the direction of the reactions. An aerobic endurance athlete is trying to give himself a competitive edge over his opponents. To improve his lactate threshold, what type of training should he engage in, and in what direction would this shift his threshold? - ✔✔-high intensity; shifts to the right Two athletes are competing in upcoming competitions, a weightlifting meet and a marathon. Which energy systems will each be primarily using, respectively? - ✔✔-phosphagen and oxidative Which of the following describes the portion of the total energy cost of exercise that must be supplied through anaerobic mechanisms due to the slow response of the aerobic system to the initial increase in the demand for energy? oxygen deficit EPOC oxygen debt recovery O2 - ✔✔-oxygen deficit The excess postexercise oxygen consumption experienced by athletes is caused by all of the following EXCEPT decreases in body temperature increased protein turnover ATP-CP resynthesis changes in energy efficiency during recovery - ✔✔-decreases in body temperature If an athlete completes a maximum sprint interval in 10 seconds as part of an interval training workout, which of the following is a recommended length of the rest period before the next sprint? - ✔✔-2 minutes During higher-intensity exercises, athletes often experience peripheral fatigue. Which of the following is believed to be the reason for this type of fatigue? lactate gluconeogenesis increase in muscle pH metabolic acidosis - ✔✔-metabolic acidosis An athlete is used to performing high-intensity aerobic exercise (90% VO2max); however, she will now be changing to longer-duration, submaximal exercise on a regular basis. This change in training strategy will typically result in what changes concerning energy supply? - ✔✔-transition from almost exclusively carbohydrate to mostly fat Which of the following is a branched-chain amino acid? glutamate alanine aspartate isoleucine - ✔✔-isoleucine Which of the following substances can be metabolized anaerobically? Glycerol Amino Acids Glucose Nitrogen - ✔✔-Glucose Which of the following reactions is the primary cause of metabolic acidosis (i.e., the decrease in intramuscular pH during high- intensity, fatiguing exercise)? fructose -6- phosphate → fructose-1, 6-bisphosphate none of the other answers are correct ATP → ADP + Pi + H+ ADP + creatine phosphate → ATP + creatine - ✔✔-ATP → ADP + Pi + H+ Which of the following energy systems produces ATP at the quickest rate? Oxidative Metabolism Fast Glycolysis Phosphagen Aerobic Glycolysis - ✔✔-Phosphagen Approximately how many net ATP are produced via the oxidative energy system from the metabolism of one glucose molecule? - ✔✔-38 Which of the following describes the change in responsiveness of a receptor to insulin? - ✔✔- downregulation All of the following hormones use a second messenger to cause effects in the body EXCEPT serotonin norepinephrine insulin cortisol - ✔✔-cortisol An athlete just completed a resistance training workout. All of the following are factors that influence the magnitude of the postworkout hormonal response EXCEPT amount of effort the athlete gave during the workout extent of structural remodeling the athlete's body requires from the workout quantity of muscle tissue stimulated by the workout degree of connective tissue repair needed after the workout - ✔✔-amount of effort the athlete gave during the workout All of the following are adaptations of the endocrine system to resistance training EXCEPT amount of hormone synthesis number of receptors in muscle tissue time needed for hormone clearance through the liver type of hormones released - ✔✔-type of hormones released Serum levels of which of the following hormones will increase as a result of performing a resistance training workout that involves large muscle group exercises with loads 85-95% of 1RM and 30- to 60- second rest periods in athletes with two or more years of resistance training experience? - ✔✔- testosterone Polypeptide hormones are made of chains of which of the following substances? - ✔✔-amino acids If the stress of a training session is too great, which of the following is true? anabolic reactions > catabolic reactions in the muscle anabolic reactions = catabolic reactions in the muscle anabolic reactions < catabolic reactions in the muscle anabolic reactions > catabolic reactions in the whole body - ✔✔-anabolic reactions < catabolic reactions in the muscle When one examines the effects of a resistance training program via peripheral blood hormone levels, which of the following is false? Higher blood hormone levels do not indicate the status of receptor populations. Increases in circulatory concentrations mean an increase in hormone release if plasma volume stays constant. Increases in peripheral hormones must be bound to a receptor in order to be realized. Correct! Higher blood hormone levels do not indicate higher receptor interaction probability. - ✔✔- Higher blood hormone levels do not indicate higher receptor interaction probability. Which of the following is a physiological role of growth hormone and its superfamily? decreased lipolysis increased immune cell function decreased protein synthesis increased glycogen synthesis - ✔✔-increased immune cell function Which of the following substances is an important biomarker for health and performance? cortisol superfamil [Show More]

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