10.3 Short Answer Questions
1) How do muscles enlarge when undergoing athletic training?
2) Fusion of embryonic ________ cells from the mesoderm creates multinucleated skeletal muscle fibers.
3) During contraction, the ________ shortens, and the ________ disappears completely.
4) Muscles in the appendages typically have their origins ________ to the insertion.
5) Typically, each skeletal muscle is supplied by one ________ and one ________.
6) Within a fascicle, every muscle fiber is surrounded by the ________.
7) The ________ filament is composed of myosin.
8) The mechanism for muscle contraction is the ________.
9) This protein adds to muscle elasticity.
10) ________ is a specialized smooth endoplasmic reticulum found in muscle fibers.
11) Muscle cells that produce ATP anaerobically via glycolysis are called ________.
12) Most muscles that are involved in maintaining posture contain high percentages of ________ fibers.
13) The difference in color between skeletal muscle fibers is caused by the abundance of ________.
14) During contraction, there is no change in the length of the ________ region of the sarcomere.
15) Muscle cells that produce ATP aerobically are called ________.