Most of the substances that move across membranes are dissolved ions and small organic molecules- Solutes –Not macromolecules and fluids Ions –Na +, K.
Cytoplasm Cytoskeleton Nucleus Nucleolus Ribosomes Rough E.R. Smooth E.R. Plasma Membrane Golgi Apparatus Mitochondria Vacuole Lysosome.
Transport Across Membrane
