An increase in which of the following increases the O2 affinity of hemoglobin?
A small amount of carbon monoxide added to blood increases its oxygen affinity, that is, it causes a leftward shift of the O2 dissociation curve . All the other choices reduce the oxygen affinity of hemoglobin, that is, they shift the dissociation curve to the right.
Temperature
PCO2
H+ concentration
Carbon monoxide added to the blood
Respiratory System Pa 2