What is the relationship between hypoxia and lactic acidosis?

What is the relationship between hypoxia and lactic acidosis?

• A. Hypoxia can lead to reliance on anaerobic glycolysis, resulting in lactic acidosis.
• B. Hyperoxia causes lactic acidosis.
• C. Lactic acidosis prevents glycolysis.
• D. Hypoxia has no relation to lactic acidosis.

Answer: (A)

When oxygen delivery to tissues is insufficient (hypoxia), cells can’t efficiently use mitochondria to make ATP, so they switch to anaerobic glycolysis to keep producing energy. In this pathway, pyruvate is converted to lactate to regenerate NAD+, allowing glycolysis to continue. The result is lactate buildup and an excess of hydrogen ions, which lowers pH and causes lactic acidosis. This relationship is why hypoxia is a classic cause of lactic acidosis. Hyperoxia doesn’t typically trigger lactic acidosis; excess oxygen isn’t the mechanism that increases lactate. Lactic acidosis does not prevent glycolysis; rather, glycolysis is the process that creates lactate during hypoxia. And hypoxia is directly related to lactic acidosis, not unrelated.

When oxygen delivery to tissues is insufficient (hypoxia), cells can’t efficiently use mitochondria to make ATP, so they switch to anaerobic glycolysis to keep producing energy. In this pathway, pyruvate is converted to lactate to regenerate NAD+, allowing glycolysis to continue. The result is lactate buildup and an excess of hydrogen ions, which lowers pH and causes lactic acidosis. This relationship is why hypoxia is a classic cause of lactic acidosis.

Hyperoxia doesn’t typically trigger lactic acidosis; excess oxygen isn’t the mechanism that increases lactate. Lactic acidosis does not prevent glycolysis; rather, glycolysis is the process that creates lactate during hypoxia. And hypoxia is directly related to lactic acidosis, not unrelated.