The diffusion of water across a selectively permeable membrane

A model of cell membrane structure representing the dynamic nature of membrane lipids and proteins

The movement of a substance across a cell membrane against a concentration gradient; requires the cell to expand energy.

Describing a solution whose solute concentration equal that inside a cell.

A membrane that keeps out some molecules but allows others to pass through

The process by which a cell surrounds and engulfs substances

Carrier proteins that are embedded in the lipid bilayer of the plasma membrane

Describing a solution whose solute concentration is higher than that inside a cell.

A process in which substances move down their concentration gradient across the cell membrane with the assistance of carrier proteins

The movement of substances across a cell membrane without the use of cell energy

The process by which molecules have from an area of greater concentration to an area of lesser concentration

The shrinking or wilting of a walled cell in a hypertonic environment

The process in which a vesicle inside a cell fuses with the cell membrane and releases its contents to the external environment

Water pressure within a plant cell

Describing a solution whose solute concentration is lower than that inside the cell

A state that exists when the concentration of a substance is the same throughout a space

A complex lipid having two fatty acids joined by a molecule of glycerol