In polysynaptic reflex arcs, one or more interneurons in the gray matter constitute the integration center. ... In autonomic (visceral) reflexes, the effector is smooth or cardiac muscle, or a gland.

What are visceral reflexes?

Visceral reflexes involve a glandular or non-skeletal muscular response carried out in internal organs such as the heart, blood vessels, or structures of the GI tract. They utilize neurons of the autonomic nervous system to elicit their actions.

Is a reflex arc Monosynaptic or Polysynaptic?

Examples of monosynaptic reflex arcs in humans include the patellar reflex and the Achilles reflex. Most reflex arcs are polysynaptic, meaning multiple interneurons (also called relay neurons) interface between the sensory and motor neurons in the reflex pathway.