A_____ is a system of protein microfilaments, intermediated filaments, and microtubules in a cell, serving in physical support, cellular movement, and the routing of molecules and organelles to their destinations within the cell
______are made of the protein actin. They form a fibrous mat called a terminal web on the cytoplasmic side of the plasma membrane.
____ are stiffer and thicker than microfilaments, are made of keratin, and strengthen our hair and nails
____ are made of protofilaments, which consist of long strands of tubulin
_____ are internal structures of a cell that carry out specialized metabolic tasks.`