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HomeHomework HelpbiologyPhospholipids

Phospholipids

Phospholipids are a class of lipids that consist of two fatty acid tails and a phosphate group attached to a glycerol backbone, forming a hydrophilic (water-attracting) head and hydrophobic (water-repelling) tails. They are essential components of cell membranes, creating a bilayer that serves as a barrier and facilitates the transport of substances in and out of cells.

intermediate
2 hours
Biology
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Overview

Phospholipids are essential components of cell membranes, characterized by their unique structure that includes two fatty acid tails and a phosphate group. This amphipathic nature allows them to form bilayers, which serve as barriers that regulate the movement of substances in and out of cells. Unde...

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Key Terms

Amphipathic
Having both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts.

Example: Phospholipids are amphipathic molecules.

Bilayer
A double layer of phospholipids that forms the basic structure of cell membranes.

Example: The cell membrane is a phospholipid bilayer.

Hydrophilic
Attracted to water; water-loving.

Example: The phosphate head of a phospholipid is hydrophilic.

Hydrophobic
Repelling water; water-fearing.

Example: The fatty acid tails of phospholipids are hydrophobic.

Fluid Mosaic Model
A model describing the structure of cell membranes as a mosaic of various components that move fluidly.

Example: The fluid mosaic model explains how proteins float in the phospholipid bilayer.

Cell Signaling
The process by which cells communicate with each other.

Example: Phospholipids play a role in cell signaling pathways.

Related Topics

Lipids
Study of various types of lipids, their structures, and functions in biological systems.
intermediate
Cell Membranes
Exploration of the structure and function of cell membranes, including transport mechanisms.
intermediate
Cell Signaling
Understanding how cells communicate and respond to signals in their environment.
advanced

Key Concepts

Amphipathic natureCell membrane structureRole in signalingBiological functions