Which class is most associated with the membrane structure of nerve tissue?

Which class is most associated with the membrane structure of nerve tissue?

• A. Cholesterol
• B. Triglyceride
• C. Phospholipids
• D. Sphingolipids

Answer: (D)

Membrane structure in nerve tissue, especially the myelin sheath that insulates axons, is closely tied to sphingolipids. These lipids use a sphingosine backbone and typically have long, saturated hydrocarbon chains that pack tightly in the membrane. This tight packing, often in concert with cholesterol, gives myelin its dense, insulating properties and contributes to the stability and compactness of nerve membranes. While phospholipids form the basic bilayer and cholesterol helps modulate fluidity, the distinctive lipid class associated with neural membranes and myelin is sphingolipids, including sphingomyelin and glycosphingolipids like galactocerebroside and gangliosides.

Membrane structure in nerve tissue, especially the myelin sheath that insulates axons, is closely tied to sphingolipids. These lipids use a sphingosine backbone and typically have long, saturated hydrocarbon chains that pack tightly in the membrane. This tight packing, often in concert with cholesterol, gives myelin its dense, insulating properties and contributes to the stability and compactness of nerve membranes. While phospholipids form the basic bilayer and cholesterol helps modulate fluidity, the distinctive lipid class associated with neural membranes and myelin is sphingolipids, including sphingomyelin and glycosphingolipids like galactocerebroside and gangliosides.