Alberta Written Barber Practice Exam

A primary function of the respiratory system is the?

1. Intake of oxygen

2. Production of hormones

3. Distribution of nutrients

4. Filtration of toxins

The correct answer is: Intake of oxygen

The primary function of the respiratory system is the intake of oxygen. This system is specifically designed to facilitate the exchange of gases—mainly oxygen and carbon dioxide—between the atmosphere and the bloodstream. When we inhale, oxygen is drawn into the lungs, where it diffuses into the blood to be transported to cells around the body, providing the essential energy needed for various physiological functions. The removal of carbon dioxide, a waste product of cellular metabolism, also occurs during this process, ensuring that the body maintains homeostasis. Other functions such as filtration of toxins occur in the respiratory tract, but they are secondary to the main objective of oxygen intake. Similarly, the production of hormones and distribution of nutrients are not processes associated with the respiratory system but rather pertain to other systems in the body, such as the endocrine and circulatory systems. Understanding these primary functions helps clarify the importance of the respiratory system in overall health and physiological balance.