Which statements describe the enteric nervous system?

Which statements describe the enteric nervous system?

• A. Is called our second brain.
• B. Has its own reflex arc.
• C. Innervates our GI tract.
• D. All the above

Answer: (B)

The enteric nervous system is a self-contained neural network embedded in the walls of the GI tract that can regulate digestive processes largely on its own. Its neurons form two major networks that coordinate gut motility and secretion in response to what's happening inside the lumen. The most distinctive feature is its own reflex arcs—local circuits that sense contents in the gut and trigger appropriate movements and secretions without needing instruction from the brain or spinal cord. This intrinsic reflex circuitry is what makes the ENS capable of autonomously managing many gut functions. It does innervate the GI tract and is often described as a “second brain” because of its complexity, but the key point emphasized here is that it has its own reflex arcs.

The enteric nervous system is a self-contained neural network embedded in the walls of the GI tract that can regulate digestive processes largely on its own. Its neurons form two major networks that coordinate gut motility and secretion in response to what's happening inside the lumen. The most distinctive feature is its own reflex arcs—local circuits that sense contents in the gut and trigger appropriate movements and secretions without needing instruction from the brain or spinal cord. This intrinsic reflex circuitry is what makes the ENS capable of autonomously managing many gut functions. It does innervate the GI tract and is often described as a “second brain” because of its complexity, but the key point emphasized here is that it has its own reflex arcs.