AP BIOLOGY

Detailed explanation-1: -The cytoskeleton maintains the shape of an animal cell. Cell appendages, like flagella and cilia, are often used for movement. The cytoskeleton is a network of threadlike proteins that are joined together.

Detailed explanation-2: -Microfilaments are fine, thread-like protein fibers, 3-6 nm in diameter. They are composed predominantly of a contractile protein called actin, which is the most abundant cellular protein. Microfilaments’ association with the protein myosin is responsible for muscle contraction.

Detailed explanation-3: -The cytoskeleton is the network of cytoplasmic protein filaments, composed of microtubules (MTs), actin filaments, and intermediate filaments, that provides an internal scaffold to give the cell shape.

Detailed explanation-4: -The cytoskeleton is a network of different protein fibers that provides many functions: it maintains or changes the shape of the cell; it secures some organelles in specific positions; it enables movement of cytoplasm and vesicles within the cell; and it enables the cell to move in response to stimuli.

Detailed explanation-5: -Integrin connects the extracellular matrix with the actin cytoskeleton inside the cell.