Muscular System Name: ____________________________________________ Get Body Smart Period: 1 2 3 4 5 6 7 8 Get Body Smart PART I: Go to and click on section “Muscle Physiology”. Under tutorials, start with “Muscle Fiber Location and Composition”, then for Part II, “Nerve Supply to Muscle Fibers” and finally for Part III “Muscle Contraction Physiology”. Complete each underlying tutorial. Location of Muscle Fibers 1.What is a bundle of skeletal muscle fibers called? 2.What other types of tissues are found that make a muscle an organ? 3.Where are the longest muscle fibers found in the body? 4.Define sarcoplasm. 5.What are myofibrils? 6.What is the plasma membrane of a muscle cell called? 7.What is the reason for striations in skeletal muscle? 8.What organelle do muscle cells have a lot of because of their high protein content and length? 9. Sarcomeres are made up of repeating subunits of a ______________ and several types of ___________.