...the plasma membrane!Diffusion, osmosis, polarization, depolarization, secretion, excretion, respiration...everything that means life.
Without its exquisite and specialized "semi-permeability" we would never have developed beyond a single cell. But even so, single celled organisms--bacteria, viruses, protists--are the most successful life forms ever, with just one membrane!
Many poisons work by "fooling" the plasma membrane--using an existing membrane function to invade and damage the cell's metabolic processes. So--always know exactly what's in the substances you ingest. Just because something is "natural" DOES NOT mean
it is healthy! Arsenic, radon, cyanide, carbon monoxide--all are " natural" substances that cross the plasma membrane and destroy the cell. And guess what? Destroyed cells-->destroyed organism!
So--be kind to your membranes today!
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