Which one of the following is the primary stimulus to breathe in normal human beings?

Question

Quizplus · Accepted Answer

The primary stimulus to breathe in normal human beings is the level of CO₂ in the body. When the level of CO₂ in the body increases, it signals the respiratory centers in the brain to increase the rate and depth of breathing, which helps to remove excess CO₂ and maintain proper blood pH levels. The amount of oxygen required by the body is important for overall health, but it is not the primary stimulus for breathing. The level of oxygen in the body is also monitored, but it is not the primary driver of breathing. Nitrogen in air has no direct effect on breathing as it is an inert gas.

Which One of the Following Is the Primary Stimulus to Breathe