Exam 2, Human Anatomy, Fall 2008
Skeletal muscles are involved in which of the following functions? A. warming the body,
b. moving the body, c. stabilizing joints,
d. all of these.
The ability of muscle to react to signals from the nervous system is called a.
b. excitability, c. extensibility, d. elasticity.
Another name for a muscle cell is
a. fiber, b. myofiber, c. myofibril, d. sarcoplasm.
The smallest unit of contraction in a muscle cell is called the a. myofibril, b. motor unit, c.
The A-bands in the striations of skeletal muscle are
a. myosin, b. actin, c. the place
where actin joins titin, d. the place in the dark band where actin does not overlap with
The t-tubules function to a. store calcium, b. process fats, c. make receptors for
d. speed up transmission of action potentials.
Of the various types of skeletal muscle fibers, those that contract the weakest are:
slow oxidative fibers, b. fast glycolytic fibers, c. fast oxidative fibers, d. slow glycolytic
Which fiber type would be in highest proportion in your biceps brachii? a. slow oxidative
b. fast glycolytic fibers, c. fast oxidative fibers, d. slow glycolytic fibers.
When you exercise, differentiated skeletal muscle fibers a. divide, b. lengthen,
d. all of these.
10. Muscles with the most amount of fine control over contraction should have a. a large
number of fibers per motor unit,
b. a small number of fibers per motor unit, c. an
intermediate number of fibers per motor unit, d. the number of fibers per motor unit is
independent of fine control.
Satellite cells are found in a. all muscle, b. cardiac only
, c. skeletal only, d. smooth only.
Duchenne muscular dystrophy (the type discussed in class) usually first shows up in a.
adult men, b. adult women