Review-- keep in mind exams are coming up
the movemnt of molecules from an area of higher concentration to an area of lower concentration | ||
difference in concentration of molecules across a distance | ||
concentration evenly distributed across a distance | ||
diffusion across membranes | ||
diffusion across a membrane | ||
direction of osmosis: diffused INTO a cell | ||
direction of osmosis: diffused OUT OF a cell | ||
directoin of osmosis: equal (NO movement) | ||
the pressure exerted against the cell wall by water | ||
cells shrink (less turgor pressure) | ||
transfer materials (that cannot readily diffuse through membrane) through membrane | ||
allow ions to pass into a cell shielded from phospholipid tails | ||
cells ingest external fluid, macromolecules and large particles through this process | ||
transport pouch of phospholipids | ||
ingestion of fluids or solutes | ||
ingestion of large particles/ whole cells | ||
ingest viruses and bacteria to destroy them before harm can be done to the organism | ||
cells release external fluid, macromolecules and large particles through this process | ||
membranes that allow certain substances to enter but block others |