21. ADH causes a reabsorption of water from the lumen of the nephron to the extracellular fluid osmotically. 22. Initially, diuretics lower blood pressure by decreasing cardiac output and reducing plasma and extracellular fluid volume. 23. In most vertebrates, sodium ions are the major determinant of the osmolarity of the extracellular fluid . 24. The resulting alternating current is used to find the instantaneous concentration of dopamine in the extracellular fluid . 25. In the osteon, where matrix is separated from extracellular fluid by tight junctions, this cannot occur. 26. The main component of this unique extracellular fluid is potassium, which is secreted from the stria vascularis. 27. Osmotic diuretics works by expanding extracellular fluid and plasma volume, therefore increasing blood flow to the kidney. 28. To make muscle contraction possible, a calcium influx from the extracellular fluid into the cell is crucial. 29. Muscles and neurons are activated by electrolyte activity between the extracellular fluid or interstitial fluid, and intracellular fluid. 30. Thus AHSG is a secreted partially phosphorylated glycoprotein with complex proeolytic processing that circulates in blood and extracellular fluids .
