The phase of injury in which ATP is produced is termed what?

The phase of injury in which ATP is produced is termed what?

• A. Metabolic changes
• B. Permeability changes
• C. Leukocyte migration
• D. Ultrastructural changes

Answer: (A)

During injury, the cell first attempts to maintain energy production even as oxygen supply is compromised. This initial response is termed metabolic changes, where ATP is still produced but at a reduced rate, mainly through anaerobic glycolysis. This shift helps the cell try to survive, but the resulting energy deficit leads to failure of energy-dependent processes, such as ion pumps, and causes cellular swelling. Permeability changes describe later membrane alterations that result from injury; leukocyte migration is part of the inflammatory response; and ultrastructural changes refer to visible organelle-level alterations. Thus, the phase focusing on the altered, still-present ATP production is metabolic changes.

During injury, the cell first attempts to maintain energy production even as oxygen supply is compromised. This initial response is termed metabolic changes, where ATP is still produced but at a reduced rate, mainly through anaerobic glycolysis. This shift helps the cell try to survive, but the resulting energy deficit leads to failure of energy-dependent processes, such as ion pumps, and causes cellular swelling.

Permeability changes describe later membrane alterations that result from injury; leukocyte migration is part of the inflammatory response; and ultrastructural changes refer to visible organelle-level alterations. Thus, the phase focusing on the altered, still-present ATP production is metabolic changes.