When you scrape your skin, white blood cells arrive to fight infection. To slow down near the site of the cut, they use selectin, which provides traction. Since selectin helps white blood cells bind to a surface, they are part of a protein group known as

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Selectin is a type of cellular adhesion molecule, which is a protein group that helps cells bind to surfaces. This is how white blood cells are able to slow down and fight infection near a cut or scrape. Integral proteins and receptors are broader categories that can include cellular adhesion molecules, but neither specifically describes selectin's role in white blood cell function. "Cellular binding molecules" is not a commonly used term in this context.

When You Scrape Your Skin, White Blood Cells Arrive to Fight