The Bohr shift refers to which of the following?

Question

anonymous · Answer

Options:

	A shift in oxygen released by hemoglobin in response to an increase in pH.
	An increase in hydroxide ions in the blood that causes the hemoglobin to give up more oxygen.
	A shift in oxygen released by hemoglobin in response to a decrease in pH.
OR
	An increase in hydrogen ions in the blood that causes the hemoglobin to bind more tightly to oxygen.

abb0t · Answer

attachment

abb0t · Answer

I think the best way to understand this is to see a graph. the shift that is being talked about is basically talking about dissociation curve of oxygen to hemoglobin. 
 if either the [H$^+$] or CO$_2$ increases, then this will reduce the affinity ("strength" or ability" to bind) of oxygen to binding to hemoglobin.