Iorn and Upper GI Tract Structure and Function Flashcards
what percent of iorn is absobed acroso the intestine into the blood
10%
what transporter transfers iorn into duodena enterocytes
dmt1
what do iorn iorns join onto to be stoed in the intracelluar
ferritin
what does iorn in blood bind to
transferrin
what is hyperaneia
increase bloow flow in body due to a response
what is the effect of hyperaemia
increase ferritin levels, and more iorn bon dot enteroycets
what is the response of iron to anmes
fretin levels will deceraes so more iorn is realsec into the blood
is heme iorn easier to absobr than non heme iorn
yes, it is more absobable form mateiros such as fish than firbers and milk
what is used to absob heme
hemae oxygenase
what valenc muse an ion be to be absorbed by dmt1
2+
what ion comple with fe to be absorbed by dmt1
any ion with a vavlency of 2+
what is the fucntion of dcytp
to covnerd fe3+ ionto fe2+
what happens to ion after it is based into the cell
it is used as ferritin, in the mitociea or leaves the cell to be tranferitin
how does iorn leave the cell
fpn
what is th danger of tannins
surround the iorn and stops it getting absorbed - 3 tannins need for 1 iorn
what transporer is used to take iorn out of the cell
ferroportin
what chemcial cuae ferropotin to work
hepcidin
what cehmcial turns fe2+ into fe3+ outside the cell
a chemcial ocnvertier
what does fe3+ turn into when it leaves the clel
transferrin
what subst3nce cen decreaes iorn absobe
millk - figits with celcilum
tea / coffe contains chlorogenic acid
what substane increase iorn absorption
citries fruits due to vit c as it turn fe3+ to fe2+ making it more soluble