Compare and Contrast Skeletal Muscle and Cardiac Muscle

Compare and contrast skeletal muscle and cardiac muscle. Which of the following does NOT accurately describe these tissues?

A) Acetylcholine is a neurotransmitter that leads to depolarization of skeletal muscle fibers and cardiac muscle fibers.
B) Cardiac muscle has an intrinsic ability to contract, whereas skeletal muscle requires neural input
C) Cardiac muscle fibers attach to each other, whereas skeletal muscle fibers attach to tendons, bone, or skin.
D) Cardiac muscle fibers generally contain metabotropic acetylcholine receptors, whereas skeletal muscle fibers generally contain ionotropic (nicotinic) acetylcholine receptors.