muscular-system-test

11. Given these events: 1) active sites on actin filament are exposed 2) actin filament slides over myosin filament 3) Ca®" ion binds to troponin 4) myosin heads move 5) cross bridges form Choose the arrangement that lists the correct order in which they occur during a single stimulation of a skeletal muscle A) 432,15 B) 3.1.5.4.2 C) 32,541 D) 2.43.5.1 E) 12345 12. For cross bridge release, it is necessary for to attach to the myosin head A) atropomyosin molecule B) ATP C) Ca*" ions D) a troponin molecule E) sarcolemma 13. Which one of the following is the correct order of structures, from superficial to deep? A) Muscle fiber, myofibril, fascicle, sarcomere, myofilament B) fascicle, muscle fiber, myofibril, myofilament, sarcomere C) muscle fiber, fascicle, myofibril, sarcomere, myofilament D) fascicle, muscle fiber, myofibril, sarcomere, myofilament E) myofibril, fascicle, muscle fiber, myofilament, sarcomere 14. Given these events: 1) action potential is formed and travels along the T-tubule 2) Ach travels across the synaptic cleft 3) the axon terminal releases Ach by exocytosis 4) sarcoplasmic reticulum is activated and releases Ca?' into the sarcoplasm 5) Ach binds to receptors on the sarcolemma Choose the arrangement that lists the correct order in which they occur during muscle contraction stimulation at the neuromuscular junction A) 243,15 B) 3.2,5,1.4