The document provides an overview of gastrointestinal function and regulation. It discusses the structure of the gastrointestinal tract and major secretions. Hormones, peptides and neurotransmitters regulate gastrointestinal secretions and motility through enteric nervous system pathways. The liver plays an important role through the portal circulation system, which directs intestinal venous outflow to the liver before returning to the heart.
Medical Physiology of the GIT:
Mucosa, principles of GIT function, afferent sensory innervation, GI reflexes, motility throughout the GI system, control of stomach emptying, coordination of motility, GI secretions, Gastric events following ingestion of a meal......
Medical Physiology of the GIT:
Mucosa, principles of GIT function, afferent sensory innervation, GI reflexes, motility throughout the GI system, control of stomach emptying, coordination of motility, GI secretions, Gastric events following ingestion of a meal......
I give this lecture in the Function and Dysfunction course for first-year veterinary students. The fluoroscopic videos of a vomiting dog was very well received.
The classical GI hormones are secreted by epithelial cells lining the lumen of the stomach and small intestine. These hormone-secreting cells - endocrinocytes - are interspersed among a much larger number of epithelial cells that secrete their products (acid, mucus, etc.) into the lumen or take up nutrients from the lumen. GI hormones are secreted into blood, and hence circulate systemically, where they affect function of other parts of the digestive tube, liver, pancreas, brain and a variety of other targets.
I give this lecture in the Function and Dysfunction course for first-year veterinary students. The fluoroscopic videos of a vomiting dog was very well received.
The classical GI hormones are secreted by epithelial cells lining the lumen of the stomach and small intestine. These hormone-secreting cells - endocrinocytes - are interspersed among a much larger number of epithelial cells that secrete their products (acid, mucus, etc.) into the lumen or take up nutrients from the lumen. GI hormones are secreted into blood, and hence circulate systemically, where they affect function of other parts of the digestive tube, liver, pancreas, brain and a variety of other targets.