For each of the following statements, indicate whether it is true of the motility system that you use to lift your arm (A), to cause your heart to beat (H), to move ingested food through your intestine (I), or to sweep mucus and debris out of your respiratory tract (R). More than one response may be appropriate in some cases.

a. It depends on muscles that have a striated appearance when examined with an electron microscope.
b. It would probably be affected by the same drugs that inhibit the motility of a flagellated protozoan.
c. It requires ATP.
d. It involves calmodulin-mediated calcium signaling.
e. It involves interaction between actin and myosin filaments.
f. It depends heavily on fatty acid oxidation for energy.
g. It is under the control of the voluntary nervous system.