Chapter 31.4, Problem 4MC

Summary Introduction

To describe:

The reason how the brain’s breathing control centers use blood $\text{CO2}$ concentration to alter the breathing rate.

Concept introduction:

Breathing includes the process of inhalation and exhalation. During the process of inhalation, the concentration of oxygen increases in the blood and lungs and during the process of exhalation, the concentration of carbon dioxide increases in the exhaled air.