it14spr201.20bc5t58-71.txt

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Movement of particles from an area of higher concentration to an area of lower concentration.

Simple diffusion
Process by which foreign particles are removed from a cell by phagosomes which engulf and digests the foreign body.

Phagocytosis
Cytoplasmic vesicle which engulfs foreign particles within a cell.

Phagosome
Process by which a cell engulfs droplets of fluid from its surroundings.

Pinocytosis
Selective cellular uptake of molecules that bind to a specific receptor.

Receptor mediated endocytosis
The process whereby part of the membrane is internalized and then reincorporated into the plasma membrane.

Membrane recycling
Vesicular processes that release material from a cell.

Exocytosis
The combination of receptor-mediated endocytosis and exocytosis that moves particles through a cell.

Transcytosis
Vesicular processes that bring matter into a cell.

Endocytosis
The difference in electrical charge across a membrane.

Electrical gradient
A stable voltage across the plasma membrane of an unstimulated.

Resting membrane potential
A shift in electrical potential across a plasma membrane to a value more negative than the RMP, tendidng to inhibit a nerve or muscle cell.

Hyperpolarization
A shift in electrical potential across a plasma membrane to a value less negative than the RMP, making a muscle or nerve cell easier to excite.

Hypopolarization
The electrical voltage due to movement of ions across a membrane

Nernst equilibrium