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HomeHomework HelpbiologyEndocytosis Overview

Endocytosis Overview

Endocytosis is a cellular process in which substances are internalized by the cell membrane, forming vesicles; it includes phagocytosis, the uptake of large particles or cells, and pinocytosis, the ingestion of extracellular fluid and dissolved solutes.

intermediate
2 hours
Biology
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Overview

Endocytosis is a vital cellular process that allows cells to take in substances from their environment. It includes two main types: phagocytosis, which involves the engulfing of large particles, and pinocytosis, which focuses on the intake of liquids and small solutes. Both processes are essential f...

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Key Terms

Endocytosis
The process by which cells take in substances from outside their membrane.

Example: Cells use endocytosis to absorb nutrients.

Phagocytosis
A type of endocytosis where cells engulf large particles.

Example: White blood cells use phagocytosis to destroy bacteria.

Pinocytosis
A type of endocytosis where cells take in liquids.

Example: Cells absorb nutrients through pinocytosis.

Vesicle
A small membrane-bound sac that transports substances within a cell.

Example: Vesicles carry proteins to the cell membrane.

Cell Membrane
The outer layer of a cell that controls what enters and exits.

Example: The cell membrane is selectively permeable.

Immune Response
The body's defense mechanism against pathogens.

Example: Phagocytosis is part of the immune response.

Related Topics

Exocytosis
The process of expelling materials from a cell, complementing endocytosis.
intermediate
Cell Membrane Structure
Understanding the structure of the cell membrane is crucial for grasping endocytosis.
intermediate
Cell Signaling
How cells communicate and respond to their environment, often involving endocytosis.
advanced

Key Concepts

PhagocytosisPinocytosisCell MembraneVesicle Formation