#Micro #filaments are usually about 7 nm in #diameter and #made up of #two #strands of #actin. Microfilament #functions #include #cytokinesis, #amoeboid #movement, #cell #motility, #changes #in #cell #shape, #endocytosis and #exocytosis, #cell #contractility, and #mechanical #stability. #Microfilaments are #flexible and #relatively #strong, #resisting #buckling by #multi #piconewton #compressive #forces and filament #fracture by #nanonewton #tensile #forces.