Skeletal,cardiac,and Smooth Muscle All Have

Question

Skeletal,cardiac,and smooth muscle all have
A)A bands and I bands.
B)transverse tubules.
C)gap junctions.
D)motor units.
E)thick and thin filaments.

Accepted Answer

Skeletal, cardiac, and smooth muscle all have thick and thin filaments, which are essential for muscle contraction. Option A is only applicable to skeletal and cardiac muscle, and not to smooth muscle. Transverse tubules are only present in skeletal and cardiac muscle, but not in smooth muscle. Gap junctions are present in cardiac and smooth muscle, but not in skeletal muscle. Motor units are unique to skeletal muscle only. Therefore, the best choice is E.