KNAT Practice Test Question

KNAT Practice Test Question from KNAT Tutor Lesson: Respiratory System

Please see the question below. Scroll down for the correct answer and video explanation.

KNAT Practice Test Answer Explanation

The correct answer is B. Carbon dioxide. Blood pH levels are determined by analyzing the concentration of carbon dioxide in the blood. The respiratory system’s primary function is to bring oxygen into the body, in exchange for carbon dioxide.  During the process of gas exchange, the blood system absorbs carbon dioxide from cells and carries it to the respiratory system, where it is exhaled from the body. When regulating blood gas and pH homeostasis levels, carbon dioxide, not oxygen, must be closely monitored.

To learn more about determining blood pH levels, watch our video explanation below:

[Source: KNAT Tutor Lesson: Respiratory System]

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