Loop of Henle -- This segment of the nephron plays a major role in the countercurrent exchange/multiplier system of water conservation. It has the ability to concentrate solutes, increase osmotic pressure, and conserve or excrete water.It also serves as a sight of Na, K, and Cl conservation.oop of Henle -- This segment of the nephron plays a major role in the countercurrent exchange/multiplier system of water conservation. It has the ability to concentrate solutes, increase osmotic pressure, and conserve or excrete water. It also serves as a sight of Na, K, and Cl conservation.