A difference between skeletal muscle and the other two muscles is:
A. the presence of striations in skeletal; absence in others.
B. the presence of troponin in skeletal; absence in others.
C. regulation by calcium in skeletal; calcium not involved in others.
D. the multinucleate cells in skeletal; uninucleate in others.
E. the requirement for ATP for skeletal muscle contraction; ATP not needed for others.