What is the cytoskeleton primarily responsible for in eukaryotic cells?

The cytoskeleton is primarily responsible for providing shape and stability to eukaryotic cells due to its network of protein filaments and tubules. This structural framework supports the cell, enabling it to maintain its shape and resist deformation. Additionally, the cytoskeleton plays a crucial role in cell movement, both of the whole cell and of organelles within the cell. By connecting to the cell membrane and other organelles, the cytoskeleton helps to organize the internal components of the cell and facilitates cellular processes such as division and motility.

In the context of other functions, while protein synthesis is the role of ribosomes and the endoplasmic reticulum, storage of calcium ions is primarily managed by the endoplasmic reticulum and other specialized structures. Transporting nutrients is a function associated with various transport proteins and vesicle movement, largely facilitated by the cytoskeleton but not its primary role. These distinctions illustrate that the cytoskeleton's main function is related to maintaining cellular structure and stability.