Transport Of Gases Flashcards
________ is the medium of transport for O2 and CO2
blood
about ________ percent of O2 is transported by rbcs in blood and remaining ___ perccent is carried in a dissolved state through plasma
97
3
nearly _______ percent of CO2 is transported by rbcs whereas _____ percent is carried as bicarbonate and ______ percent is carried in a dissolved state through plasma
20-25
70
7
red coloured pigment which contains iron present in rbcs
haemoglobin
O2 can bind with haemoglobin in a reversible manner to form
oxyhaemoglobin
each haemoglobin molecule can carry a maximum of _____ molecules of O2
four
binding of oxygen with haemoglobin is primarily related to
pO2
other factors that interfere in binding of oxygen to haemoglobin
pCO2
hydrogen ion concentration
temperature
what type of curve is obtained when percentage saturation of haemoglobin with O2 is plotted against pO2
sigmoid
the sigmoid curve is called
oxygen dissociation curve
favourable factors in alveoli for formation of oxyhaemoglobin
high pO2
low pCO2
lesser H+ concentration
lower temperature
favourable conditions for dissociation of oxygen in tissues are
low pO2
high pCO2
high H+ concentration
higher temperature
every 100ml of oxygenated blood can deliver around ____ ml of O2 to tissues under normal physiological conditions
5
CO2 is carried by haemoglobin as
carbamino-haemoglobin
rbcs contain a very high concentration of carbonic anhydrase which facilitates which reactions
carbon dioxide and water to carbonic acid (reversible)
carbonic acid to bicarbonate ion and hydrogen ion (reversible)
