GIT Flashcards
(19 cards)
Horse oesophagus
Vagus and glossopharyngeal
What plexus is found in the submucosa
Meissners plexus
Function of meissners plexus
regulating glandular secretions
Examples of glandular secretions in the stomach
gastric pits - HCL, Pepsinogen, Mucin, Gastic hormones
What plexus is found in the muscularis
Auerbacchs/Myenteric plexus
Function of the myenteric plexus
Regulation of smooth muscle contractions in the GIT
What effect does the parasympatheic system have on gut function
Enhances it to increase the rate of digestion i.e. gastric motility & enzyme secretion (rest/digest)
What effect does the sympatheic system have on gut function
Reduces gut function to divert blood supply to muscles & heart (fight/run)
What parasympathetic nerves innervate the rumen
Predominantly the vagus nerve
What does the Vagus nerve control in the rumen?
Both sensory and motor functions, as well as gastric groove reflex
What sympathetic nerves innervate the rumen?
The splanchnic nerve
What does the splanchnic nerve control in the rumen
Lil bit of contraction & arteriole diameter (diverting blood flow)
What nerves control Prehension (chewing)
Facial nerve, glosso-pharyngeal & motor branch of the trigeminal nerve
Which nerves control the involuntary phase of swallowing (deglutition)
Facial, glossopharyngeal, vagus
What do issues swallowing often arise because of?
Brain lesions
What sympathetic nerves innervate the liver?
Celiac plexus
What parasympathetic nerves innervate the liver?
The vagus nerve
What nerves innervate the pancreas?
Vagus nerve & Spinal sensory nevre
What are the peristaltic pacemakers in the intestines?
ICC (intersitial cells of Cajal)
