What does it mean to say a cell is squamous, stellate,columnar, or fusiform?

What are the 4 main functions of the cell membrane?

Does a cell wall surround a cell membrane or a plasma membrane?

if you visualize the cytoskeleton of a cell that is expanding in one direction, you typically observed a strong orientation of the cytoskeleton. Please answer the following three questions. a. Would the cytoskeleton be oriented parallel or perpendicular to the direction of cell expansion?  b. Would the cellulose fibers in the cell wall be parallel or perpendicular to the cytoskeleton?  c. Explain why cytoskeleton, cellulose fibers, and direction of cell expansion have the relationship mentioned in a and b?