Muscle is an excitable tissue that it can be stimulated to produce an action potential. An action potential is an electrical change across the membrane. Muscle contraction requires a great deal of energy. The aerobic energy of a resting muscle comes two- thirds from fatty acids and one-

Some common words found in the essay are:
, intensity exercise, intensity exercise increases, cardiac muscle, action potential, exercise increases, lactic acid, breakdown fat,
Approximate Word count = 324
Approximate Pages = 1 (250 words per page double spaced)