#cell membrane
- Agglutinogen — An antigen substance, protein or carbohydrate in nature, located on the outer surface of the erythrocyte membrane, bacteria, or other biological cells. Its structural interaction with a specific agglutinin in the plasma triggers the agglutination reaction, serving as the core biochemical element that defines blood types within the ABO and Rh systems.
- Alasotonic — Pertaining to the tonicity or osmotic pressure specific to a saline solution; characterized by the structural balance between the salt concentration of an external liquid medium and that of internal cellular fluids, preventing cellular dehydration or membrane rupture. In a molecular physiological sense, the term describes the property of a mineral solution to maintain constant the osmotic pressure of living tissues exposed to interactions with sodium or chloride ions.
- Axolemma — A specialized plasma membrane (plasmalemma) that completely surrounds and structurally delimits the axon of a nerve cell. This fine cellular barrier plays a crucial physiological role in maintaining the resting potential and in the ultra-fast propagation of the action potential via voltage-gated sodium and potassium channels, ensuring a delicate and coordinated transmission of the nerve impulse toward other synapses.