Substance dizzolved in a solution
Substance that dizzolves another substance (solute) in a solution
a measure of the amount of solute dizzolved in a fixed amount of solvent in a solution
the movement of molecules across the cell membrane without an input of energy by the cell.
a state inwhich the inside and the outside of the cell are equal in concentration
the diffusion of a solute through a membrane
difusion of water through the membrane
the concentration outside the cell is higher thatn the inside of the cell. the net diffusion movement of the water is out of the cell.
the concentration outside the cell is LOWER than the inside fo the cell. the net diffusion movement of the water is into the cell.
the concentraion inside and outside the cell are equal. water flows in and out equaly.
The amount more the molecules move in or out of the cell.
Freshwater Organisms & Osmosis
water is constantly diffusing in and out of the organism. the contraction vacueles are organelles that regulate water levels in pramecia.
Plant & Osmosis: Hypertonic
water diffuses out of the cell; the cell membrance shrinks away from the cell wall. turgure pressure decreases. this is called plasmolysis
in plants, the preasure between the cell wall and cell membrane.
Plant & Osmosis: Hypotonic
water diffuses into cell; water may ve stored in central vacuole; the cell was helps keep the cell's size and shape; but the membrane pushes against the cell wall. this is called turger pressure.
Animal & Osmosis: Hypotonic
water diffuses into the cell. sinse there is no cell wall to stop the cell from bursting, the contraction vacuole pumps water out. this is called cytolysis.
Animal & Osmosis: Hypertonic
water diffuses out of the cell, causing it to shrink untill it is shirveled up. this is called crenation.
a molecule that binds to a carrier protien on one side of the cell memebrane
positive or negative charged molecules pass through proteins, protecting them from the lipid bilayer.
using energy to move molecules across the cell membrane form an area of low concentration to an area of high concentration
portien that pumps in 3 sodium (Na+) molecures. while pumping out 2 potassium (K+).
cell ingest external materials by folding around them, forming a pouch. the puch then pinches off and becomes a vesicle
the vesicle contians solvents or fluids
the vesicle contains large particles or other cells
vesicles made by the cell fuse with the cell membrane, releasing their contents into the external enviornment