CSCS Exam Prep Questions with Correct Answers

Components of myofibrils myosin- thick filament, with head , rsponsible for splitting ATP providing energy for the power stroke to grab onto the actin actin- thin filament, double helix troponin in actinbinds with Ca2+ from SR, exposes binding site on myosin to form cross bridges Crircular muscle structure arranged in a concentric ring Convergent muscle structure broad origin leading to a fan shaped muscle, looks similar to a brush or duster Parallell or longitudinal muscle structure long fascicles parallel to the long axis of muscle, looks similar to 3 long lines unipennnate muscle structure short fascicles insert obliquely into one side of a tendon, looks similar to a comb bipennate muscle structure fascicles insert into opposite sides of a central tendon, looks similar to a pine tree upside down multipennate muscle structure tendon branches within a muscle, looks like multiple bipennate muscles combined Isokinetic muscle action When a muscle shortens at a constant speed over the full range of motion; a dynamic movement that doesnt occur naturally such as dynamometers somatic nervous system the division of the peripheral nervous system that controls the body's skeletal muscles autonomic nervous system the part of the peripheral nervous system that controls the glands and the muscles of the internal organs (such as the heart). Its sympathetic division arouses; fight or flight its parasympathetic division calms; rest and digest Summation increased force of contraction by a skeletal muscle fiber when a twitch occurs before the previous twitch relaxes