10.2 True/False Questions
1) Muscle tissue can be characterized as being excitable and elastic, but not extensible.
2) Skeletal muscle is responsible for movements of the appendages, but not the abdomen.
3) The origin of a muscle can also be an insertion, depending on the position of the body and the movement being performed.
4) Of the surrounding connective tissues of the muscle, the endomysium is the most superficial.
5) Skeletal muscle fibers are multinucleate, because they arose from a number of embryonic cells.
6) The repeating segments seen in a skeletal muscle fiber are the T tubules.
7) The Z disks, sometimes referred to as Z lines, define each sarcomere at both ends.
8) Fascicles are bundles of muscle fibers wrapped together within perimysium.
9) During contraction, the A band of a sarcomere shortens.
10) Delayed-onset muscle soreness is caused by inflammation that results from microscopic tears in muscle fibers following exceptionally strenuous muscle activity.
11) Muscular dystrophy is a sex-linked, dominant gene that primarily affects females.
12) Fibromyalgia is a muscular disease, and its cause is known to be genetic.
13) Skeletal muscles never undergo mitosis after they are fully formed.
14) Contraction of a muscle cell requires the influx of calcium into the sarcoplasm.
15) Actin and myosin shorten while the muscle is contracting.