Mass transport Flashcards
haemoglobin made up of how many polypeptide chains
4 polypeptides
what gives haemoglobin its red colour
iron ions
loading
haemoglobin binding with oxygen
unloading
haemoglobin releasing oxygen
when and where is oxyhaemoglobin formed
when O2 is loaded onto haemoglobin it forms oxyhaemoglobin where theres a high pO2
where does oxyhaemoglobin unload
where theres a low pO2
in the alveoli why does o2 load onto haemoglobin to form oxyhaemoglobin
because o2 enters blood capillaries at alveoli in lungs and the alveoli has a high pO2
what do cells use when respiring and what does it do
cells use O2 when respiring and it causes the pO2 to lower which is why red blood cells deliver oxyhaemoglobin to respiring tissues causing it to unload O2 (release)
why red blood cells deliver oxyhaemoglobin to respiring tissues
cells use O2 when respiring and it causes the pO2 to lower. red blood cells cause it to unload O2 (release)
where is there a high affinity for O2
at the lungs
reversible reaction for haemoglobin
Hb+4O2<=>HbO8
how does CO2 affect O2 unloading
Hb. gives O2 up easily at high pCO2
what do cells produce
CO2 so that raises the pCO2 increasing rate of oxygen unloading
if theres a high affinity of pCO2 what affect does that have on the dissociation curve
shifts it to the right
role of Hb
transport oxygen
