What helps the materials cross the membrane and are also part of the cytoskeleton?

Proteins known as transporters or channels facilitate the movement of materials across the cell membrane. These proteins can be part of the cytoskeleton, which provides structural support and aids in the transport of vesicles and other cellular components. Additionally, motor proteins, such as kinesins and dyneins, interact with the cytoskeleton to move cargo within the cell, helping to transport materials to and from the membrane.