Microfilaments are primarily involved in which cellular functions?

Microfilaments are a key component of the cytoskeleton in eukaryotic cells, primarily composed of actin filaments. Their role is crucial in maintaining cellular structure and shape, providing mechanical support to the cell. This allows cells to retain their integrity and resist deformation under various conditions.

In addition to structural support, microfilaments play a vital role in cell movement. They are involved in processes such as cytokinesis, where they help in the division of the cytoplasm during cell division, and in amoeboid movement, which is observed in certain types of cells such as macrophages. Microfilaments also contribute to the formation of cellular extensions like microvilli and lamellipodia, enabling motility and interaction with the environment.

Thus, the correct answer highlights the essential functions of microfilaments in maintaining the shape of the cell and facilitating movement, which are fundamental to various cellular processes and overall cell behavior.