How can the differential movement across the membrane influence the size and shape of the cell? (this is for human anatomy and physiology)

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this