What is a primary cause of Respiratory Acidosis?

Respiratory Acidosis occurs when there is an accumulation of carbon dioxide (CO2) in the bloodstream due to inadequate ventilation. This condition is primarily caused by hypoventilation, where breathing is insufficient to meet the body's demands for oxygen or to expel adequate CO2.

In cases of hypoventilation, such as those seen in respiratory conditions (like chronic obstructive pulmonary disease or COPD), neuromuscular diseases, or sedation from medications, the body cannot effectively remove the CO2 produced by metabolism. As CO2 levels rise, they combine with water in the body to form carbonic acid, which leads to a decrease in blood pH, resulting in acidosis.

Understanding this mechanism is crucial for recognizing the physiological consequences of hypoventilation and the resulting acid-base imbalance. In contrast, the other options represent conditions that either would not lead to increased CO2 retention or would even promote CO2 elimination. Excessive exercise may lead to temporary respiratory alkalosis due to increased respiration rates, while hyperventilation actively reduces CO2 levels, and overhydration does not directly impact carbon dioxide levels in the blood.