GIT 1 Flashcards
describe the gut structure
continuous structure from mouth to anus
what is the gut lined with
epithelial lining to help with absorption
how is the surface area increased of the gut
villi
what does the mucosal gland secrete
mucus from the small and large bowel and acid to help absorb nutrients
what runs around the tube
layers of muscle which allow for peristaltic waves to push food from one end to another
what is the purpose of the liver
produces bile salts and allows for emulsification of fats in diet increasing absorption
where are bile salts stored
in the gall bladder and released in response to food
what does the pancreas do
breaks down complex molecules increasing absoprtion
also releases secretions into the duodenum
also secretes insulin into the circulation in response to food in the tract
what provides the guts blood supply
the mesenteric arteries-branch of the aorta and this flows through the mesenteries
describe the venous drainage of the gut
the blood drains from the gut into the portal venous system
liver hepatocytes filter and metabolise drugs, nutrients (vitamins!) before releasing them into the systemic circulation
describe the nerve supply to the gut
parasympathetic stimulation promotes gut motility and gut secretion
sympathetic stimulation reduces gut motility and secretion
what signs and symptoms do we get from GIT diseases
Nausea and vomiting
Heartburn/epigastric pain
Loss of appetite
Abdominal pain
Unintentional weight loss
Malabsorption
Vitamin deficiency
Anaemia
what is one of the main symptoms we consider in git iSSUES
changes in bowel habit
varies from 3 times a day to every 3 days is normal
what other changes can we notice in bowel habits
painful BMs
blood/mucus in stool
tenesmus
describe GORD
The stomach acid is very low pH and has enzymes in it which can pass up the oesophagus and cause damage
how is the stomach protected by acid
goblet cells which produce mucus for protection