BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 49.5, Problem 1LO
Summary Introduction
To describe: The actions of secretion, reabsorption, and filtration.
Introduction: Osmoregulation and maintenance of body fluid levels ensure proper thermoregulation, sufficient organ perfusion, electrolyte balance, and excretion of wastes. The exchange of electrolytes and water between the external environment and the animal’s body occurs through specialized epithelial cells. In most vertebrates, the exchange occurs in the kidney by a filtration process. The complex organ kidney consists of numerous repeating units referred to as nephrons. Each nephron has a loop that deeply penetrates the medulla portion of the kidney.
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Chapter 49 Solutions
BIOLOGY
Ch. 49.1 - Prob. 1LOCh. 49.1 - Prob. 2LOCh. 49.2 - Identify the relative toxicity and solubility of...Ch. 49.3 - Prob. 1LOCh. 49.3 - Define reabsorption and secretion.Ch. 49.4 - Prob. 1LOCh. 49.4 - Explain the role of the loop of Henle in the...Ch. 49.5 - Prob. 1LOCh. 49.5 - Prob. 2LOCh. 49.5 - Prob. 3LO
Ch. 49.6 - Prob. 1LOCh. 49.6 - Prob. 2LOCh. 49 - Prob. 1DACh. 49 - Which of the following is NOT an ion...Ch. 49 - Prob. 2UCh. 49 - A sharks blood is isotonic to the surrounding...Ch. 49 - An important function of the excretory system is...Ch. 49 - Which of the following is a function of the...Ch. 49 - Humans excrete their excess nitrogenous wastes as...Ch. 49 - An osmoregulator would maintain its internal...Ch. 49 - Prob. 1ACh. 49 - A viral infection that specifically interferes...Ch. 49 - Diuretics are drugs that can be used to treat high...Ch. 49 - Caffeine inhibits the secretion of ADH. Prior to...Ch. 49 - You and your study partner want to draw the...Ch. 49 - You are studying renal function in different...Ch. 49 - Prob. 1SCh. 49 - Johns doctor is concerned that Johns kidneys may...
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- How does the formation of urine help maintain the bodys internal environment?arrow_forwarddescribe how the nervous system, hormones, and thenephron itself regulate filtration.arrow_forwardIdentify the principal factors that influence filtrationand explain how they affect the rate of filtrateformation.arrow_forward
- The proximal convoluted tubule: A) Functions in reabsorption and secretion and functions both actively and passively B) Functions only in reabsorption C) Functions solely passively D) Functions only in secretion E) Functions solely activelyarrow_forwardExplain how epithelial cells of the proximal convoluted tubule are adapted for reabsorption.arrow_forwardDescribe the relationship between filtration rate, reabsorption rate, excretion rate and renal threshold.arrow_forward
- Distinguish among filtration, tubular reabsorption, andtubular secretion as they relate to urine formation.arrow_forwardDescribe the filtration membrane, and explain the structures that do not normally pass through it.arrow_forwardThe proximal convoluted tubule is primarily responsible for 1.) Reabsorption 2.) Blood pressure 3.) Secreation of waste 4.) Filtrationarrow_forward
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