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HomeHomework HelpbiologyExocytosis

Exocytosis

Exocytosis is a cellular process in which vesicles containing substances fuse with the plasma membrane to release their contents outside the cell. This mechanism is essential for the secretion of hormones, neurotransmitters, and other molecules.

intermediate
2 hours
Biology
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Overview

Exocytosis is a vital cellular process that allows cells to expel materials, such as hormones and neurotransmitters, by using vesicles that fuse with the plasma membrane. This mechanism is crucial for various physiological functions, including communication between cells and the regulation of substa...

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Key Terms

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

Example: Vesicles carry neurotransmitters to the synapse.

Plasma Membrane
The outer boundary of a cell that regulates what enters and exits.

Example: The plasma membrane is selectively permeable.

Neurotransmitter
Chemicals that transmit signals across a synapse from one neuron to another.

Example: Dopamine is a well-known neurotransmitter.

Hormone
A signaling molecule produced by glands that regulate various physiological processes.

Example: Insulin is a hormone that regulates blood sugar levels.

Fusion Proteins
Proteins that facilitate the merging of vesicles with the plasma membrane.

Example: SNARE proteins are essential for vesicle fusion.

Endocytosis
The process by which cells take in substances by engulfing them.

Example: Endocytosis allows cells to absorb nutrients.

Related Topics

Endocytosis
The process of taking substances into the cell by engulfing them.
intermediate
Cell Membrane Structure
Understanding the components and functions of the cell membrane.
intermediate
Cell Signaling
The mechanisms by which cells communicate and respond to their environment.
advanced

Key Concepts

vesicle transportplasma membranecellular secretionmembrane fusion