The cell membrane possesses a remarkable and vital capacity for spontaneous self-repair and healing following minor disruptions, punctures, or mechanical stress. Because phospholipid molecules naturally organize themselves into a bilayer driven by hydrophobic interactions, small tears or holes in the membrane reseal almost instantly as surrounding lipids flow back together to cover the opening. Additionally, cells utilize active repair mechanisms involving vesicular fusion, calcium-dependent protein signaling, and cytoskeletal remodeling to patch larger membrane wounds and restore normal barrier function before intracellular contents can leak out.
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