Digestion and Absorption Flashcards
what is TPN?
total parenteral nutrition (straight to blood)
what is the processing of food into smaller units capable of absorption?
digestion
what is process of allowing units across mem of enterocytes?
absorption
probs of feeding through vein?
absorption probs, can’t have polysacc, loss of enjoyment (no eating), contamination, don’t know exact ratio of fat to give
what are accessory organs?
liver, pancreas, gallbladder, sal. glands
what is mastication?
chewing and saliva
what is mixing of food in esophagus called?
peristalsis
what happens in duodenum?
active transport of many nutrients
what happens in jejunum?
a.a., fatty acids, disacc, water sol vit cleaved from ptn
what happens in ileum?
a.a., vit b12, bile salts
absorptive surface of epithelial cell is:
brush border membrane
cells cross ____ to rest of body
basolateral membrane
epithelial cells shed into the ____ every 2-3 days
lumen
what can go wrong in D and A?
lack of enzymes, disruption of absorption by disease, bypass surgery
4 types of transport crossing mem
diffusion, facilitated diffusion, active transport, pinocytosis
