CSCS Exam Questions & Answers 100% Correct(SCORED A+)

Muscle Anatomy - ANSWERmuscle belly, fascicle, muscle fiber, myofilaments Muscle connective tissues - ANSWERTendon, epimysium, perimysium, endomysium Motor Unit - ANSWER1 alpha motor neuron and all the muscle fibers it innervates neuromuscular junction - ANSWERthe junction between a motor neuron and one muscle fiber Sarcolemma - ANSWERmuscle cell membrane Ca++ - ANSWERmain ion that controls muscle contraction A-band - ANSWERdark area; extends length of the thick filaments I-band - ANSWERthin filaments only H-zone - ANSWERThe region at the center of an A band of a sarcomere that is made up of myosin only. The H zone gets shorter (and may disappear) during muscle contraction. Sarcomere - ANSWERcontractile unit of a muscle fiber Actin - ANSWERthin filaments with troponin and tropomyosin Myosin - ANSWERthick filament All or None principle - ANSWERall fibers within a motor unit contract and develop force at the same time Muscle twitch - ANSWERthe response of a muscle to a single brief threshold stimulus Muscle tetany - ANSWERThe summation of many muscle fiber twitches. Sliding filament: resting phase - ANSWERno tension in the muscle Sliding filament: excitation-contraction phase - ANSWERSR releases CA2+, binds to tro