1)Immediately following the arrival of
the stimulus at a skeletal muscle cell there is a short period
called _____ period during which the events of
excitation-contraction coupling occur.

a. Contraction

b. Relaxation

c. Latent

d. None of the above

2)Smooth muscle is characterized by all
of the following except:

a. It appears to lack troponin

b. There are more thick filaments than thin filaments

c. There are no sarcomeres

d. There are noncontractile intermediate filaments that attach
to dense bodies within the cell

3)In many hollow organs, two sheets of
smooth muscle are present. The longitudinal sheet is the _____
layer (=sheet)

a. Outer

b. Middle

c. Inner

d. All of the above

e. None of the above

4)Synchronization of smooth muscle
contraction reflects electrical _____ of smooth muscle cells by
_____.

a. Isolation; tight junctions

b. Isolation; gap junctions

c. Coupling; tight junctions

d. Coupling gap junctions

5)In skeletal muscle contraction,
calcium apparently acts to:

a. Increase the action potential transmitted along the
sarcolemma

b. Release the inhibition on Z discs

c. Remove the blocking action of tropomyosin

d. Cause ATP to bind to actin