If the loop of Henle were to be completely absent from a mammalian nephron, what would be the primary effect on the urine produced?

Step-by-step solution

The primary function of the loop of Henle is to create and maintain a high osmolarity in the medullary interstitial fluid through the counter-current mechanism. This hypertonic medullary gradient is strictly required for the reabsorption of water from the collecting duct (facilitated by ADH) to concentrate the urine. If the loop of Henle were absent, the medullary osmotic gradient would not be established. Without this gradient, water cannot be efficiently reabsorbed from the later parts of the tubule and collectin