Chemical buffer systems
A)respond in one to three minutes to changes in hydrogen ion concentration
B)stimulate the respiratory center when acidosis occurs
C)promote H+ excretion by the kidneys when acidosis occurs
D)are the most powerful mechanism for regulating changes in [H+] within the body
E)buffer changes in acid or base levels

Question

Quizplus · Accepted Answer

Chemical buffer systems are the first line of defense against changes in acid or base levels in the body. They work by neutralizing excess acids or bases, thus preventing large changes in the pH of the body fluids. The three main chemical buffer systems in the body are the bicarbonate buffer system, the phosphate buffer system, and the protein buffer system. While they are effective in buffering changes in acid or base levels, they are not the most powerful mechanism for regulating changes in [H+]. This is because they can become saturated if large amounts of acid or base are produced or removed from the body, which can lead to systemic acid-base disturbances. Additionally, chemical buffer systems do not respond as quickly to changes in [H+] as other mechanisms such as the respiratory and renal systems.

Chemical Buffer Systems