What effect do postganglionic fibers have on the stomach?

The role of postganglionic fibers in the autonomic nervous system, particularly those associated with the enteric nervous system, can significantly influence gastric function. When postganglionic fibers are activated, they primarily modulate the activity of smooth muscle and glands within the stomach.

In the context of pyloric contraction, postganglionic fibers play a crucial role in coordinating motility. The pyloric sphincter, which controls the passage of partially digested food from the stomach to the duodenum, can be contracted by specific nerve signals. This contraction can limit the movement of contents out of the stomach, thereby slowing down peristalsis—the wave-like muscle contractions that move food through the digestive tract.

Thus, the stimulation of pyloric contraction leads to an inhibition of peristalsis, as the stomach needs to regulate its contents before they enter the small intestine. This function is especially important during digestion, as it allows for more thorough breakdown and mixing of food with gastric juices, which is crucial for proper digestion and nutrient absorption later in the digestive process.

While other options may seem relevant to gastric function, they do not accurately reflect the primary role of postganglionic fibers in influencing gastric motility and emptying. This