There are lots. A main one would be sodium though :)
The major cation in cytoplasm is potassium (K+). It plays a key role in maintaining cell function and regulating cell volume.
Extracellular material is found outside of the cell.
on the outside of the cell no neccesarily
Around the outside of a PLANT cell.
The major cation in cytoplasm that is essential for membrane function is potassium (K+). Potassium plays a crucial role in maintaining cell membrane potential, regulating cell volume, and supporting various cellular processes.
Cytosol => inside volume of the cell
Just outside the cell membrane.
i think it is the cell membrane
It's actually called a cell wall, and it is found outside the plasma membrane which surrounds the cell.
potassium
Membranes do not have a stiff outside. I suspect the answer you are looking for is the cell wall, which is a stiff structure found outside the cell membrane of a plant cell, but separate from it.
The cell wall