The presence of a loop of Henle in nephrons is an evolutionary adaptation that enables mammals and birds to reabsorb water efficiently and produce a(n)________ urine.
A)hypertonic
B)hypotonic
C)osmolar
D)isotonic

Question

Quizplus · Accepted Answer

The loop of Henle allows for the creation of a concentration gradient in the renal medulla, which enables the reabsorption of water in the descending limb and the secretion of ions in the ascending limb. This leads to the production of a hypertonic urine, which allows for efficient water conservation in mammals and birds.

The Presence of a Loop of Henle in Nephrons Is