The Cytoskeleton

This lecture covers the structure, functions, and requirements of the cytoskeleton, a network of protein filaments essential for cell organization, shape maintenance, and movement. It explores the mechanical properties of cytoskeletal elements, such as actin and microtubules, and their dynamic organization within cells. The instructor discusses the process of cytoskeletal polymer growth, filament buckling, and the critical forces involved. Additionally, the lecture delves into the concept of treadmilling, where cytoskeletal filaments simultaneously grow at one end and shrink at the other. Various models for polymer growth and the dynamic instability of microtubules are also examined.