Vesicular Transport and Endocytosis

These flashcards cover the key vocabulary associated with vesicular transport and endocytosis, including various mechanisms and definitions.

Vesicular Transport

The transport of large particles, macromolecules, and fluids across the membrane in membranous sacs called vesicles, requiring cellular energy (ATP).

Exocytosis

The process of transporting materials out of the cell, often activated by cell-surface signals or changes in membrane voltage.

Endocytosis

The process of transporting materials into the cell, involving the formation of vesicles.

Phagocytosis

A type of endocytosis where pseudopods engulf solids, forming a vesicle called a phagosome.

Pinocytosis

A form of endocytosis where the plasma membrane infolds to bring extracellular fluid and dissolved solutes into the cell, often referred to as fluid-phase endocytosis.

Receptor-mediated Endocytosis

A selective form of endocytosis that allows cells to concentrate specific materials by binding extracellular substances to specific receptor proteins.

Phagosome

The vesicle formed when a cell engulfs a large particle during phagocytosis.

Transcytosis

A process where vesicles transport substances across the cell from one side to another.

Lysosome

An organelle that fuses with endocytic vesicles to digest and breakdown materials ingested by the cell.

Residual Body

A vesicle that contains undigested contents remaining in the phagosome after digestion.