ileum

Created by

sophie w

Cards (18)

list the features that allows the ileum to be adapted for absorption 
very long , folded , villi and microvilli
how long is the ileum 
6m , very long
where is the villi located on the ileum 
on the surface folds
where is the micro villi located on the ileum 
on the epithelial cells lining the villi
what is the function of the lacteal in a villus 
this is a lymphatic capillary that absorbs dietary fats
what specialised cells are found in the mucosa of the ileum 
columnar epithelial cells and goblet cells
what are the two adaptations of the columnar epithelial cells 
micro villi to increase the surface area and a large amount of mitochondria for active transport
what is the function of goblet cells in the ileum 
these cells secrete mucus that lubricates and protects the lining of the intestines
where are enzymes located in the ileum 
in the tips of the villi
what are endopeptidases and exopeptidases 
these are proteins (enzymes)that help with digestion of polypeptides and peptides into amino acids
where are endopeptidases and exopeptidases secreted 
cells in the tips of the villi of the gut lumen
what is an example of a carbohydrase 
maltase
what are carbohydrases 
these are enzymes that hydrolyse disaccharides into monosaccharides
where are carbohydrases located 
on the epithelial cell membranes
what does maltase hydrolyse maltose down into 
2 alpha glucose molecules
what does sucrase hydrolyse sucrose into 
fructose and glucose
what does lactase hydrolyse lactose into 
glucose and galactose
what is crohns disease 
where the villi in the small intestines are destroyed