Question

An example of unstriated muscles which are entirely involuntary are located

• A. In diaphragm
• B. In eyelids
• C. In pylorus
• D. At base of external ear

Answer 1

Answer: (C)

In pylorus

Sphincters can be voluntarily or involuntarily controlled. Voluntary sphincters are supplied by somatic nerves. Involuntary sphincters (unstriated muscles) are stimulated by autonomic nerves. The pylorus or pyloric part is the region of the stomach, that connects to the duodenum. The pyloric sphincter, at the lower end of the stomach, is involuntary.

So, the correct answer is option C.