What does hypoventilation result in?

• A. Increased carbon dioxide elimination
• B. Fulfilled gas exchange needs
• C. Under-ventilation of the lungs
• D. Enhanced oxygen uptake

Answer: (C)

Hypoventilation refers to a condition where there is insufficient ventilation of the lungs, which leads to a decreased rate of air exchange. This under-ventilation means that not enough fresh air is entering the lungs, and, consequently, there is an inadequate removal of carbon dioxide from the bloodstream. As a result, carbon dioxide levels in the blood can increase, causing respiratory acidosis, and this can adversely affect the body’s overall metabolic functioning.

Understanding that hypoventilation implies a shortfall in the lungs’ ability to perform their primary function of gas exchange clarifies why the statement regarding under-ventilation aligns with the physiological consequences of hypoventilation. The other answer choices involve processes that either require adequate ventilation or are directly opposed to the effects of hypoventilation, making them inconsistent with its definition and consequences.