QuestionFebruary 2, 2026

16 Buffering Systems in the Blood The regulation of breathing Is controlled not by the amount of oxygen we have circulating in our blood, but Instead by the pH of the blood. Receptors in the brain respond to changes in the pH of the blood, triggering an Increase In the breathing rate If the blood becomes too acidic. Place the following events in order. showing how the body maintains a stable blood pH In response to changes in the carbon dioxide levels in the blood. Assume that a person is exercising and her muscles are releasing carbon dioxide. Rank the options below Increase in breathing rate.exhalling more carbon dioxide Carbonic acid dissociates into water and carbon dioxide. Carbon dioxide combines with water to form carbonic acid There is an increase In carbon dloxide in the blood.

16 Buffering Systems in the Blood The regulation of breathing Is controlled not by the amount of oxygen we have circulating in our blood, but Instead by the pH of the blood. Receptors in the brain respond to changes in the pH of the blood, triggering an Increase In the breathing rate If the blood becomes too acidic. Place the following events in order. showing how the body maintains a stable blood pH In response to changes in the carbon dioxide levels in the blood. Assume that a person is exercising and her muscles are releasing carbon dioxide. Rank the options below Increase in breathing rate.exhalling more carbon dioxide Carbonic acid dissociates into water and carbon dioxide. Carbon dioxide combines with water to form carbonic acid There is an increase In carbon dloxide in the blood.
16 Buffering Systems in the Blood The regulation of breathing Is controlled not by the amount of oxygen we have circulating in our blood, but Instead by the pH of the blood. Receptors in the brain respond to changes in the pH of the blood, triggering an Increase In the breathing rate If the blood becomes too acidic. Place the following events in order. showing how the body maintains a stable blood pH In response to changes in the carbon dioxide levels in the blood. Assume that a person is exercising and her muscles are releasing carbon dioxide. Rank the options below Increase in breathing rate.exhalling more carbon dioxide Carbonic acid dissociates into water and carbon dioxide. Carbon dioxide combines with water to form carbonic acid There is an increase In carbon dloxide in the blood.

Solution
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Answer

1. There is an increase in carbon dioxide in the blood. ### 2. Carbon dioxide combines with water to form carbonic acid. ### 3. Carbonic acid dissociates into water and carbon dioxide. ### 4. Increase in breathing rate, exhaling more carbon dioxide. Explanation 1. Identify Initial Event **There is an increase in carbon dioxide in the blood.** This occurs due to muscle activity during exercise. 2. Formation of Carbonic Acid **Carbon dioxide combines with water to form carbonic acid.** This is a chemical reaction that occurs in the blood. 3. Dissociation of Carbonic Acid **Carbonic acid dissociates into water and carbon dioxide.** This process helps buffer the blood pH. 4. Increase in Breathing Rate **Increase in breathing rate, exhaling more carbon dioxide.** This physiological response helps reduce carbon dioxide levels, stabilizing blood pH.

Explanation

1. Identify Initial Event<br /> **There is an increase in carbon dioxide in the blood.** This occurs due to muscle activity during exercise.<br /><br />2. Formation of Carbonic Acid<br /> **Carbon dioxide combines with water to form carbonic acid.** This is a chemical reaction that occurs in the blood.<br /><br />3. Dissociation of Carbonic Acid<br /> **Carbonic acid dissociates into water and carbon dioxide.** This process helps buffer the blood pH.<br /><br />4. Increase in Breathing Rate<br /> **Increase in breathing rate, exhaling more carbon dioxide.** This physiological response helps reduce carbon dioxide levels, stabilizing blood pH.
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