Fill in the blanks below Countercurrent Mechanism and the regulation of water le

Question

Fill in the blanks below

Countercurrent Mechanism and the regulation of water levels:
The juxtamedullary nephrons with loops of Henle that span the cortex of the kidney into the medulla have a special function in regulating osmolarity in the body via water retention. In these nephrons, the descending limb of the loop of Henle is permeable to ________while the ascending limb is permeable to _______ . This creates a steep osmolarity gradient from the cortex where there is low osmolarity to the bottom of the loop in the medulla in which the solute concentration is really high. The collecting ducts pass through this same region in which the loop of Henle is and this allows the kidney to suck more water out of the filtrate if necessary. If the hormone __________ is released when water is low in the body, this makes the collecting duct cells make______________ (aka water channels) and additional water is reabsorbed using the gradient generated by the Loop of Henle.

Explanation / Answer

The descending limb of the loop of Henle is permeable to WATER while the ascending limb is permeable to IONS

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