3 Movement into and out of cells Flashcards
Osmosis
It is the diffusion of water from a dilute solution into a more concentrated solution through a partially permeable membrane.
Partially permeable membrane
The membrane allows only the small molecules to pass through but not the large ones.
Diffusion
It is the net movement of molecules from a region of high concentration to a region of low concentration down a concentration gradient.
Turgid
A cell charged with water with its walls in a state of tension
Flaccid
A call, no longer charged with water
concentrated solution
It has a large mass of solute dissolved in a given volume of solvent
dilute solution
It has a small mass of solute dissolved in a given volume of the solvent
Solution
A mixture forms when one substance dissolves another.
water potential
The physical property predicting the direction in which water will flow, governed by solute concentration and applied pressure.
concentration gradient
A difference in the concentration of a substance across a distance.
Turgor pressure
The pressure that water molecules exert against the cell wall
active transport
Energy-requiring process that moves material across a cell membrane against a concentration difference
water potential gradient
A difference in water potential in one region compared with that in another region. Determines the direction that water moves, always from regions of higher water potential to regions of lower water potential.
Visking tubing/dialysis tubing
Type of synthetic tubing that is partially permeable, allowing only water and some other small molecules to pass through its pores.
kinetic energy
the energy an object has due to its motion
