Which one of the following are "myogenic" type of muscles?

Explanation

The three muscle types (Cardiac, Smooth, Skeletal) can be further classified into two categories i.e. myogenic and neurogenic. Myogenic means originating in or produced by muscle cells themselves. Neurogenic means originating in or produced by nerve cells or neurons. The contractions of cardiac muscle fibers are described as myogenic, since they are produced spontaneously, without requiring stimulation from nerve cells. This is solely due to the presence of the SA and AV nodes on the heart, capable of producing electrical impulses to stimulate contraction. Single-unit visceral smooth muscle is myogenic; it can contract regularly without input from a motor neuron (as opposed to multiunit smooth muscle, which is neurogenic - that is, its contraction must be initiated by an autonomic nervous system neuron). Skeletal muscle on the contrary is neurogenic since it can contract when stimulated by a motor neuron. Hence, the only correct answer is Option B.