Which is a short-term metabolic effect within the endothelium?

Which is a short-term metabolic effect within the endothelium?

• A. Blebs
• B. Folds
• C. Edema
• D. Microcyst

Answer: (A)

Endothelial cells under acute stress show a rapid, short-duration metabolic response that manifests as membrane blebbing. When metabolism is challenged, the actin cortex loosens and contractile forces push the membrane outward, forming blebs. These protrusions are transient and reversible, reflecting an immediate intracellular response rather than longer-term remodeling. Edema, by contrast, is the leakage of fluid across the endothelium leading to tissue swelling—a fluid-handling outcome rather than an intracellular event. Folds and microcysts describe other structural changes that aren’t the quick metabolic reaction seen with blebbing. So the short-term metabolic effect within the endothelium is blebbing.

Endothelial cells under acute stress show a rapid, short-duration metabolic response that manifests as membrane blebbing. When metabolism is challenged, the actin cortex loosens and contractile forces push the membrane outward, forming blebs. These protrusions are transient and reversible, reflecting an immediate intracellular response rather than longer-term remodeling. Edema, by contrast, is the leakage of fluid across the endothelium leading to tissue swelling—a fluid-handling outcome rather than an intracellular event. Folds and microcysts describe other structural changes that aren’t the quick metabolic reaction seen with blebbing. So the short-term metabolic effect within the endothelium is blebbing.