What damage to skin cells is exacerbated by oxidative stress from free radicals?

• A. Protein synthesis
• B. Cell membrane integrity
• C. Electrolyte balance
• D. Blood oxygenation

Answer: (B)

The correct answer highlights that oxidative stress from free radicals significantly affects cell membrane integrity. Free radicals are highly reactive molecules that can cause damage to various cellular components, and one of the primary targets is the lipid bilayer of cell membranes.

When free radicals attack the lipids in cell membranes, they can lead to lipid peroxidation, which not only disrupts membrane structure but can also compromise the membrane's functionality. This results in leakage of cellular contents, disruptions in signaling pathways, and impairment in the transport of essential molecules in and out of the cell.

Membrane integrity is crucial for maintaining the proper physiological functions of cells, including those found in the skin. Damage can lead to skin aging, inflammatory responses, and overall compromised barrier functions, which are vital for protecting against environmental toxins and pathogens.

Addressing the other options provides a clearer understanding of the unique impact of oxidative stress. Protein synthesis may be influenced indirectly by oxidative stress but is not specifically exacerbated like membrane integrity. Electrolyte balance primarily refers to the homeostasis of ions and is not directly tied to oxidative stress. Blood oxygenation is related to the respiratory and circulatory systems and is not directly affected by oxidative damage to skin cells. Hence, the effect of free radicals on cell