CSCS testing material

To which of the following structures do the cross-bridges attach during muscle action? a.) actin b.)myosin c.) M-bridge d.)sacrolemma

Which of the following substances regulates muscle actions? a.) potassium b.) calcium c.)troponin d.)tropomyosin

Which of the following substances acts at the neuralmuscular junction to excite the muscle fibers of a motor unit? a.)acetylcholine b.)ATP c.)creatine phosphate d.)serotonin

Which of the follwoing muscle fiber types is the most beneficial for a marathon runner. a.)type 1 b.) Type 2a c.)type 2X d.)type 2C

When throwing a baseball an athletes 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? a.)golgi tendon organ b.)muscle spindle c.)extrafusal muscle d.) Pacinian corpuscle

From which of the follwing is the hearts electrical impulse normally initiated? a.)AV node b.)SA node c.)the brain d.)the sympathetic nervous system

Which of hte following occurs during the QRS complex of typical ECG? 1.)depolarization 2.)repolarization of the atrium 3.)repolarization of the ventricle 4.) depolarization of the ventricle a.)1&3 only b.)2&4 only c.)1,2,3 only d.)2,3,4 only

Which of the follwing is the ultimate source of energy for muscular contraction? a.) GTP b.)oxygen c.)NADH d.)ATP

Which of the following substances can be metabolized anaerobically? a.) protein b.) carb c.) fat d.) glycerol

The predominant energy system used during a training session depends primarily on the? a.) session intensity b.)session duration c.) athletes training status d.)athletes lean body mass

The production of lactic acid reslults from the activation of which of the following energy systems? a.)phosphagen b.) slow glycolysis c.)fast glycolysis d.) fat oxidation

Which of the follwing energy systems has the highest rate of energy production? a.)phosphagen b.) fast glycolysis c.) fat oxidation d.)carb oxidation

Approximately how many ATP are produced via the oxidative energy system from the degeradation of one glucose molecule? a.)27 b.)36 c.)38 d.)41

Which of the following energy systems is predominantly active at the initiation of all exercise? a.)oxidative b.)phosphagen c.)slow glycolysis d.)fast glycolysis

Which of the following enzymes catalyzes the rate limiting step of glycolysis? a.)PFK b.)isocitrate dehydrogenase c.)phophorylase d.)lactate dehydrogenase