Final answer:
Buffers in biological systems play a vital role in maintaining constant pH conditions.
Explanation:
Buffers are solutions that moderate pH changes by resisting sudden changes in pH when an acid or base is added. In biological systems, buffers play a crucial role in maintaining constant pH conditions necessary for proper physiological functioning. They consist of a weak acid and its conjugate base, which absorb excess hydrogen or hydroxide ions to keep the pH stable.
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