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sphingomyelin
This term refers to a specific phospholipid that is critical for the structural integrity of the myelin sheath, which insulates axons to ensure rapid electrical impulse conduction in the nervous system. It is used almost exclusively in biochemical, medical, and neurological contexts, carrying a neutral, technical connotation.
As a chemical compound and a specific biological molecule, it is treated as an uncountable noun. It does not have a plural form in standard scientific usage; instead, quantities are described using mass units or by referring to the "levels" or "concentrations" of the substance.
Meanings
A type of sphingolipid found in animal cell membranes, particularly abundant in the myelin sheath of nerve cell axons.
The degradation of sphingomyelin by the enzyme sphingomyelinase is a key step in signal transduction.
Examples
Sphingomyelin is a primary component of the myelin sheath.
The enzyme sphingomyelinase breaks down sphingomyelin into ceramide and phosphocholine.
The enzyme sphingomyelinase breaks down sphingomyelin into ceramide and phosphocholine.
Wait, does sphingomyelin only exist in the nervous system?
Niemann Pick disease is caused by a deficiency in the enzyme that metabolizes sphingomyelin.
I wonder if the concentration of sphingomyelin varies across different brain regions.
The lipid bilayer contains a significant amount of sphingomyelin and cholesterol.
The lipid bilayer contains a significant amount of sphingomyelin and cholesterol.
Sphingomyelin helps to insulate the axon for faster signal transmission.
We need to analyze the sphingomyelin levels in the plasma samples.