MDCAT Chemistry MCQ #4330

A group of people breathe in a mixture of gases, including CO2, which is absorbed into the bloodstream. What occurs to the pH of the arterial blood?

MDCAT Chemistry MCQ #4330

  1. Question 1

    Q1. A group of people breathe in a mixture of gases, including CO2, which is absorbed into the bloodstream. What occurs to the pH of the arterial blood?

    • A) Increases due to acidic CO2
    • B) Decreases due to acidic CO2
    • C) Remains unchanged due to buffer system
    • D) Increases due to basic CO2

    Answer: Decreases due to acidic CO2

    Explanation: CO2 reacts with water to form carbonic acid, increasing the hydrogen ion concentration and decreasing pH.