What is the second phase in the listed sequence of injury phases?

What is the second phase in the listed sequence of injury phases?

• A. Ultrastructural Changes
• B. Primary Injury
• C. Permeability Changes
• D. Leukocyte Migration

Answer: (A)

Ultrastructural changes are the next step after the initial injury. They reflect early intracellular responses, such as mitochondrial swelling, dilation of the endoplasmic reticulum, and detachment of ribosomes, showing the cell beginning to lose function even before the membrane barriers become more permeable. After these internal adjustments, membrane permeability changes occur, leading to ionic imbalances and further cellular damage, which then trigger inflammatory responses like leukocyte migration. So the second phase is the ultrastructural changes.

Ultrastructural changes are the next step after the initial injury. They reflect early intracellular responses, such as mitochondrial swelling, dilation of the endoplasmic reticulum, and detachment of ribosomes, showing the cell beginning to lose function even before the membrane barriers become more permeable. After these internal adjustments, membrane permeability changes occur, leading to ionic imbalances and further cellular damage, which then trigger inflammatory responses like leukocyte migration. So the second phase is the ultrastructural changes.