How does hypoxia affect cellular function?

How does hypoxia affect cellular function?

• A. It has no impact on cells
• B. It disrupts normal metabolism and can lead to cell injury or death
• C. It increases ATP production
• D. It immediately repairs damaged DNA

Answer: (B)

Oxygen is essential for efficient energy production in cells. When oxygen is limited, mitochondria can’t carry out oxidative phosphorylation effectively, so ATP production drops. To keep functioning, cells shift toward anaerobic glycolysis, which is far less efficient and creates lactic acid, lowering the cellular pH. That energy deficit disrupts critical cellular processes, especially the Na+/K+-ATPase pump that maintains ion gradients. When ion balance fails, cells swell, membranes become leaky, and metabolic function deteriorates, which can lead to irreversible injury or cell death if the hypoxia persists. Therefore, hypoxia disrupts normal metabolism and can culminate in cell injury or death. It isn’t true that there’s no impact, that ATP increases, or that DNA is immediately repaired in response to hypoxia.

Oxygen is essential for efficient energy production in cells. When oxygen is limited, mitochondria can’t carry out oxidative phosphorylation effectively, so ATP production drops. To keep functioning, cells shift toward anaerobic glycolysis, which is far less efficient and creates lactic acid, lowering the cellular pH.

That energy deficit disrupts critical cellular processes, especially the Na+/K+-ATPase pump that maintains ion gradients. When ion balance fails, cells swell, membranes become leaky, and metabolic function deteriorates, which can lead to irreversible injury or cell death if the hypoxia persists.

Therefore, hypoxia disrupts normal metabolism and can culminate in cell injury or death. It isn’t true that there’s no impact, that ATP increases, or that DNA is immediately repaired in response to hypoxia.