Modifiers matching buffer:

• standard,
• minor,
• nonvolatile,
• nontoxic,
• volatile,
• physiological,
• mobile,
• urinary,
• exogenous,
• natural,
• inorganic,
• alkaline,
• charged,
• salt,
• common,
• working,
• appropriate,
• aromatic,
• enzymatic,
• dilute,
• endogenous,
• acid,
• biological,
• cellular,
• chemical,
• simple,
• basic,
• organic,
• complex,
• gaseous,
• intracellular,
• inexpensive,
• active,
• acidic,
• stable,
• ancillary,

Simple categories matching endogenous:

• substance,
• lipoprotein,
• compound,
• damage,
• protease,
• monoamine,
• cofactor,
• peptide,
• hormone,
• steroid,
• control,
• corticosteroid,
• chromophore,
• soporific,
• substrate,
• proteinase,
• opsonin,
• carbohydrate,
• reactant,
• amine,
• molecule,
• ion,
• androgen,
• catecholamine,
• volatile,
• change,
• lipid,
• receptor,
• corticoid,
• neurotransmitter,
• component,
• chemical,
• buffer,
• contaminant,
• protein,
• material,
• constituent,
• fluid,
• acceptor,
• antigen,
• agent,
• process,
• diamine,
• sterol,
• phosphatase,
• cation,
• vasopressor,
• acid,
• metabolite,
• polysaccharide,
• solute,
• enzyme,
• pathogen,
• nucleotide,
• ligand,
• cause,
• nucleoside,
• factor,
• macromolecule,
• glucocorticoid,
• sugar,
• metal,
• activator,
• gene,
• variable,
• system,
• signal,
• estrogen,
• virus,
• pigment,
• vasoconstrictor,