Ergosterol is a sterol compound produced by fungi and some protozoa that serves to strengthen and maintain the structure and stability of their cell membranes.

Ergosterols

Eukaryotic plasma membranes contain sterols, including cholesterol, that alter membrane fluidity, distinguishing them from prokaryotic membranes.

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The eukaryotic plasma membrane is structurally similar to prokaryotic membranes, with components moving according to the fluid mosaic model. However, it contains sterols that modify membrane fluidity, along with glycoproteins and glycolipids that facilitate cell recognition and the detection of infectious particles.

Eukaryotic Plasma Membrane

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Eukaryotic Membrane Sterols

Sphingolipids are specialized lipids found in many eukaryotic cell membranes that are thought to play a role in maintaining membrane stability, signal transduction pathways, and cell-to-cell communication.

Sphingolipids

Phagocytosis, meaning "cell eating," is a type of endocytosis where large particles or other cells are engulfed by a folding of the plasma membrane, enclosing the particle in a pocket that pinches off to form a vacuole that completely surrounds it within the cell.

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