When viewed from a microscope, there is no striation presented in the muscle, and moreover, since it is no controlled by our willpower, it is called involuntary, nonstriated muscle.
Muscle spindle is an important proprioceptor in the skeletal muscle, which contributes to the maintenance of muscular tension and the fine modulation of voluntary movements.
On the other hand, if you go for an interview at the second kind of company, where things are more relaxed, it wouldn't be appropriate to speak very formally.