Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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If antidiuretic hormone (ADH) concentration increases, a. urine volume increases. b. urine concentration decreases. c. urine volume decreases and urine concentration increases. d. urine volume increases and urine concentration decreases.
Expert Solution
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Step 1
The excretory system is a passive biological mechanism that eliminates excess, unwanted elements from an organism's body fluids in order to help maintain internal chemical balance and prevent physical damage. Excretory systems have two functions: they eliminate waste products of metabolism and they empty the body of used up and broken down components in a liquid and gaseous condition.
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Step 2
If antidiuretic hormone (ADH) concentration increases, urine volume decreases, and urine concentration increases.
ADH promotes the reabsorption of water from tubular fluid, resulting in a decrease in urine volume and an increase in urine concentration.
Tubular secretion is the process by which materials are transferred from peritubular capillaries to the renal tubular lumen; it is the inverse of reabsorption. Active transport and passive diffusion are the primary causes of this secretion.
Hence the correct option is 'c'.
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