CSCS Exam Scientific questions with correct answers

what are the major muscles and muscle groups? Where are they located Answer upper body: abdominal, pectoral, trapezius, latissimus dorsi, erector spinae, biceps, and triceps lower body: quadriceps, hamstrings, gastrocnemius, gluteus, soleus describe muscle organization from smallest to largest functional unit. Identify the components of the contractile unit. Answer the sarcoplasm is the cytoplasm of the muscle fiber hundreds of myofibrils dominate sarcoplasm. molecular level: actin and myosin microscopic level: myofibrils and sarcomere cell level: myoblasts and myofibers tissue level: neuromuscular junctions and fascicles organ level: major skeletal muscles of the body the sarcomere is the smallest contractile unit(in this are the two types of myofilament, actin and myosin are organized longitudinally) sarcomeres are within myofibrils parallel to and surrounding each myofibril is an intricate system of tubules called the sarcoplasmic reticulum