Final answer:
The gastroileal reflex stimulates ileal motility, the ileogastric reflex inhibits gastric motility, and the intestino-intestinal reflex inhibits intestinal motility in response to various stimuli such as the presence of food in the stomach or distension of the intestines.
Step-by-step explanation:
The student's question asks for a description of the gastroileal, ileogastric, and intestino-intestinal reflexes. These reflexes coordinate the motility of the gastrointestinal tract in response to various stimuli, such as the presence of food in the stomach and the distension of the intestines:
- Gastroileal reflex: This is a long reflex that increases the strength of segmentation in the ileum, leading to increased ileal motility. It helps move the contents of the small intestine toward the large intestine and is stimulated by food in the stomach.
- Ileogastric reflex: This inhibits gastric motility as a feedback mechanism when there is a sufficient amount of chyme in the duodenum. It helps regulate the rate at which the stomach empties, ensuring the duodenum is not overwhelmed.
- Intestino-intestinal reflex: This inhibits intestinal motility in response to irritation or excessive distension of the intestinal lumen. It serves to prevent further filling of an already distended section of the intestine, thereby avoiding potential damage.
The correct answer to the student's question is:
- b) Gastroileal: Stimulates ileal motility, Ileogastric: Inhibits gastric motility, Intestino-intestinal: Inhibits intestinal motility