animal mass transport Flashcards
sigmoid shape of curve
binding of first o2 changes tertiary structure of hb
uncovers haem group binding sites making further binding of oxygens easier
bohr effect
effect of co2 conc on
Dissociation of oxyhaemoglobin
curve shifts to the right
co2 conc effect on dissociation of oxyhemoglobin
increase blood co2
lower ph
reduces hb affinity for oxygen as tertiary structure changes slightly
so faster unloading of oxygen to respiring cells at given po2
advantage of bohr effect
more dissociation of oxygen
faster aerobic respiration
so more ATP made
vena cava
deoxygenated blood from respiring body tissue to heart
pulmonary artery
deoxygenated blood from heart to lungs
pulmonary vein
oxygenated blood from lungs to heart
aorta
oxygenated blood from heart to respiring body tissues
renal artery
oxygenated blood to kidney
renal vein
Deoxygenated blood from kidneys to vena cava
atrial systole
atria contract
volume decreases pressure increases
av open when pressure in atria exceed ventricles
slv shut as pressure in ventricles less than arteries
blood pushed into ventricles
ventricular systole
ventricles contract
volume decreases
pressure increases
av shut as pressure in ventricles exceed atria
slv open as pressure in ventricles exceed arteries
blood pushed out heart via arteries
diastole
ventricles and arteries relax
volume increases
pressure decreases
sly shut when pressure in arteries exceed ventricles
av open when pressure in atria exceed ventricles blood fills aria via veins flows passively to ventricles
av closed
pressure in ventricle higher than atrium to prevent back flow of blood from ventricles to atrium
arteries STF
blood away from heart at high pressure
thick smooth elastic tissue maintaining blood flow
thick elastic tissue can stretch and recoil to maintain high pressure
thick wall withstand pressure
folded endothelium to reduce friction and stretch
narrow lumen to maintain high pressure