MCQ Physiology Answer 13

The Correct Answer is D

The enteric nervous system has as many neurons as are found in the spinal cord to provide local control of the GI system.

Reflex responses are initiated by specific sensory input and always yield the same response. Motor programs activate pattern-generating circuitry that control things such as intestinal motility.

The neuron types in the enteric nervous system include sensory neurons (chemoreceptors, mechanoreceptors, thermoreceptors), which report sensory information to the interneurons that coordinate local reflex circuits.

In addition to innervating the esophagus, stomach, and pancreas, the vagus nerve also innervates the intestine to the level of the transverse colon. Pelvic nerves provide parasympathetic innervation to the remainder of the colon, the rectum, and anus.

Category: Physiology MCQs