Flashcards in Small Intestine Function Deck (19):
What is the main function of the duodenum?
Gastric acid neutralisation
What is the main function of the jejunum?
What is the main function of the ileum?
What is the purpose of crypt cells?
Secrete Cl and water
When secreted in the small intestine, where does water leave from?
Epithelial cells lining the crypts of Lierberkuhn
What is water secretion a consequence of?
Active secretion of chloride into the intestinal lumen
How many Na, K, Cl co transporter transport at a given time?
1 Na 1K 2Cl
What is the driving force behind the co transporter of Na K and Cl
Sodium potassium ATPase
What channel is absent in cystic fibrosis?
What is segmentation?
Contraction and relaxation of short intestinal segments
What is the function of segmentation?
Provides thorough mixing of contents with digestive enzymes
Brings chyme into contact with absorbing surface
What causes segmentation contractions?
Depolarisation generated by pacemaker cells in longitudinal muscle layer
What happens to the basic electrical rhythm from the intestine to the rectum?
How will parasympathetic stimulation effect segmentation contractions?
How will sympathetic stimulation effect segmentation contractions?
What is the migrating motility complex?
Pattern of peristaltic activity travelling down the small intestine
What happens to MMC when food enters the stomach?
What is the function of MMC?
Moves undigested material into large intestine
Limits bacterial colonisation of small intestine?