______ help regulate acid-base balance in the blood.Multiple choice question.CarbohydratesLipidsProteins

The correct answer is Proteins.

Proteins play a crucial role in regulating acid-base balance in the blood, primarily through their buffer systems. They can accept or donate hydrogen ions (H⁺), helping to maintain a stable pH level in the body. This buffering action is essential for various physiological processes, including enzymatic reactions and overall metabolic function.

In contrast, carbohydrates and lipids do not have a significant role in maintaining acid-base balance. While they are vital macronutrients providing energy and structural components in cells, they do not directly influence blood pH regulation as proteins do.