What is respiratory acidosis primarily caused by?

• A. Inadequate ventilation
• B. Excess carbon dioxide elimination
• C. Increased oxygen levels
• D. Rapid breathing

Answer: (A)

Respiratory acidosis is primarily caused by inadequate ventilation. This condition occurs when the lungs cannot remove enough carbon dioxide (CO2) from the body, leading to an accumulation of CO2 in the bloodstream. When CO2 levels rise, blood pH decreases, resulting in acidosis.

Inadequate ventilation can be due to various factors, such as respiratory diseases, central nervous system depression, or neuromuscular disorders that impair the ability to breathe effectively. This accumulation of CO2 increases carbonic acid levels in the blood, contributing to the decrease in pH.

Other factors like excess carbon dioxide elimination or increased oxygen levels do not lead to respiratory acidosis. In fact, enhanced ventilation would promote the elimination of CO2 and help raise blood pH. Rapid breathing can actually help counteract acidosis by expelling CO2 faster than the body produces it. Thus, inadequate ventilation is fundamentally the key driver behind respiratory acidosis.