The concentration of potassium ions is 5 mM outside and 100 mM inside, but the membrane is impermeable to these ions. We will keep the intracellular and extracellular fluids electroneutral by making sure that there's an appropriate number of matching negative ions (depicted as ‘A-’ above) on both sides of the membrane. If we measure Em in this new situation, it will be:
0 mV.
positive.
negative.

the endomembrane system is a series of compartments that work together to package, label, and ship proteins and molecules. in your cells, the endomembrane system is made up of both the endoplasmic reticulum and the golgi apparatus. these compartments are folds of membranes that form tubes and sacs in your cells.

i dont know this but ask your teacher for !

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.