Question

4 which of the following has an effect on the ph of blood? multiple choice oxygen nitrogen phosphate carbon dioxide

Explanation:

Carbon dioxide (\(CO_2\)) reacts with water (\(H_2O\)) in the blood to form carbonic acid (\(H_2CO_3\)), which dissociates into hydrogen ions (\(H^+\)) and bicarbonate ions (\(HCO_3^-\)). The increase or decrease in \(H^+\) concentration affects the pH of the blood. Oxygen (\(O_2\)) and nitrogen (\(N_2\)) do not directly participate in such reactions that significantly alter the hydrogen - ion concentration in the blood. Phosphate can be part of buffer systems, but in the context of the given options, carbon dioxide has a more direct and well - known effect on blood pH through the carbonic acid - bicarbonate buffer system.

Answer:

Carbon dioxide