Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion
Laboratory Manual for Anatomy and Physiology, 6e Loose-Leaf Print Companion
6th Edition
ISBN: 9781119304142
Author: Connie Allen, Valerie Harper
Publisher: WILEY
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Chapter 37, Problem 1FN
Summary Introduction

The kidneys are paired and bean-shaped structures that are present below the hips and on either side of the spine. A nephron is the functional unit of a kidney. Millions of nephrons exist in each kidney. The main functions of the kidney and nephron are to filter blood and to form urine.

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Answer to Problem 1FN

Descending loop of Henle is the part of nephron that is involved in reabsorption of an additional 15% of water by osmosis and it is impermeable to solutes.

Explanation of Solution

The filtrate from the proximal convoluted tubule travels to the descending limb of the loop of Henle. This region is low permeable to urea and ions. The main function of the loop of Henle is to promote concentration gradient in the medulla of the kidney.

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