1 Battle star, an award issued to U.S. Navy ships for participation in battles.  Battlestar (fictional spaceship), a type of spaceship in the original and new television series Battlestar Galactica.
Smooth muscle is fundamentally different from skeletal muscle and cardiac muscle in terms of structure, function, regulation of contraction, and excitation-contraction coupling. Smooth muscle cells known as myocytes, have a fusiform shape and, like striated muscle, can tense and relax.
Like smooth muscle, cardiac muscle has muscarinic receptors. The effect of acetylcholine on cardiac muscle, however, is very different from its effects on skeletal or smooth muscle.In the heart, acetylcholine activation of muscarinic receptors causes channels in the muscle membrane to let potassium pass.This has the effect of slowing contraction of the heart muscle and making it beat with less force.cetylcholineâs Effect On Smooth Muscle. Acetylcholine activates a different type of receptor present in smooth muscle: the muscarinic receptor. When this receptor binds acetylcholine, one result is the release of calcium ions from internal stores.