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Electrolytes
MLT Electrolytes
| Term | Definition |
|---|---|
| electrolytes | compounds which dissociate in solution to form ions |
| non-electrolytes | molecules that remain intact in body water e.g. glucose, BUN, creatinine |
| renin-angiotensin-aldosterone | system which aids in regulation of blood volume |
| renin | enzyme from kidney, converts angiotensinogen to angiotensin I |
| angiotensin II | 3 functions - vasoconstriction, acts on hypothalamus to initiate ADH secretion, acts on adrenals to secrete aldosterone |
| aldosterone | adrenal hormone which acts on kidney to retain sodium (& water) and excrete potassium |
| natriuretic peptides | ANP, BNP hormones which promote sodium (and water) excretion from the kidney |
| osmolality | physical property of a solution based on the concentration of solutes per kilogram of solvent |
| colligative properties | describes the behavior of solutions that can change based solely on the concentration of particles present |
| ADH-thirst sensation | regulatory mechanisms of the hypothalamus stimulated by plasma osmolality |
| bone minerals | calcium, phosphorus, magnesium |
| lactate | by-product of anaerobic metabolism |
| anion gap | estimation of the difference between the unmeasured anions and unmeasured cations |
| ionized calcium | physiologically active form of calcium |
| total calcium | total of all forms of calcium in plasma (protein-bound, anion-bound, free) |
| sodium | major extracellular cation |
| potassium | major intracellular cation |
| chloride | major extracellular anion |
| bicarbonate | extracellular anion |
| ISE | ion selective electrode - measures the voltage (potential) differences between the measuring electrode and the reference electrode |
| mmol/L | units for electrolyte measurements |