In the lungs, gases move across systemic capillaries and an exchange of oxygen and carbon dioxide occurs at the cellular level. Which of the following is true regarding carbon dioxide? Select all that apply.

Question

Quizplus · Accepted Answer

Carbon dioxide (CO2) is indeed a waste product of cellular metabolism, specifically the metabolism of oxygen as cells use oxygen to produce energy, CO2 is produced as a byproduct. It is released from the body through the lungs at the alveoli, where gas exchange occurs, allowing CO2 to be exhaled and oxygen to be inhaled. CO2 also plays a crucial role in regulating the respiratory rate by influencing the respiratory centers in the brain; high levels of CO2 in the blood can trigger an increase in the rate and depth of respiration to expel more CO2. Additionally, CO2 is vital in maintaining the acid/base balance in the body through its role in the bicarbonate buffer system, which helps to maintain blood pH within a narrow range.

In the Lungs, Gases Move Across Systemic Capillaries and an Exchange