Final answer:
Microfilaments, or actin filaments, have the ability to disassemble and reform quickly when white blood cells need to move quickly to the site of an infection.
Step-by-step explanation:
Microfilaments, also known as actin filaments, have the ability to disassemble and reform quickly when white blood cells need to move quickly to the site of an infection. They provide rigidity and shape to the cell and can depolymerize and reform quickly, enabling cells to change shape and move. White blood cells, such as phagocytes, use this ability to move to infection sites and destroy pathogens.