A slight change in pH can harm the cell. Changes in the pH of blood are moderated at a safe level through the use of certain substances.

What substance acts to prevent sudden pH changes in bodily fluids?

A.) salt

B.) base

C.) acid

D.) buffer

Answer: Option D.

Buffer.

Explanation:

A buffer is an aqueous substance that acts to prevent or resist rapid or large sudden pH change in the body fluids or when acidic or basic components is added to it. It has the power or ability to neutralize acid or base, thereby maintaining the pH of the body fluids or substance. Buffer are either weak acids or weak base that resist sudden pH change.

D.) buffer

Explanation:

To buffer means "to cushion or protect." Buffers are weak acids or bases that react with stronger acids and bases to prevent sudden changes in pH in the fluids of living organisms.

So, the correct answer to this question is buffer