MRCP UK EXAMINATIONS

Detailed explanation-1: -The gastrocolic reflex is a physiological reflex that controls the motility of the lower gastrointestinal tract following a meal. As a result of the gastrocolic reflex, the colon has increased motility in response to the stretch of the stomach with the ingestion of food.

Detailed explanation-2: -Interneurons. Interneurons are an integral part of the stretch reflex arc (Figure 1) and play a major role in maintaining muscle tone. They are inhibited or excited by multiple descending fiber systems. Multiple interneuronal pathways exist and their role in spasticity is discussed later.

Detailed explanation-3: -The enterogastric reflex is stimulated by the senses. This reflex releases acid in the duodenum or in the stomach, and suppresses the release of digestive proteins. The gastrocolic reflex increases movement in the gastrointestinal tract, and reacts to stretches in the stomach walls as well as in the colon.

Detailed explanation-4: -G-cells secrete gastrin hormone. Which neural reflex is initiated by food in the stomach and what does it control? The gastric phase causes increase in stomach motility and secretory activity of gastric cells.