EBK HUMAN PHYSIOLOGY
7th Edition
ISBN: 9780133983401
Author: Silverthorn
Publisher: YUZU
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Textbook Question
Chapter 20, Problem 1CC
Does the apical membrane of a collecting duct cell have more water pores when vasopressin is present or when it is absent?
Expert Solution & Answer
Summary Introduction
To determine: Whether the apical membrane of a collecting duct cell contains more water pores when vasopressin is present or absent.
Introduction: The excretory system of the body has a specialized organ called the kidneys. Kidneys have nephron where urine formation takes place. The nephrons have a duct called collecting duct.
Explanation of Solution
The cells present in the collecting duct can alter their permeability. The collecting duct contains a hormone called vasopressin. This hormone can add water pores in the apical membrane of the collecting duct. The membrane with more water pores helps the cells to retain more water. However, the apical membrane that does not contain the hormone vasopressin has no water pores. They are less permeable and reabsorb less water into the blood.
The apical membrane with vasopressin contains more water pores than the membrane that does not has vasopressin. The vasopressin hormone helps in the reabsorption of water into the blood.
Conclusion
The apical membrane of a collecting duct cell contains more water pores when vasopressin is present.
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Chapter 20 Solutions
EBK HUMAN PHYSIOLOGY
Ch. 20 - Does the apical membrane of a collecting duct cell...Ch. 20 - Prob. 2CCCh. 20 - A scientist monitoring the activity of...Ch. 20 - If vasopressin increases water reabsorption by the...Ch. 20 - Experiments suggest that there are peripheral...Ch. 20 - Prob. 6CCCh. 20 - Prob. 7CCCh. 20 - In Figure 20.9b, what forces cause Na+ and K+ to...Ch. 20 - Prob. 9CCCh. 20 - Laboratory values for ions may be reported as...
Ch. 20 - A man comes to the doctor with high blood...Ch. 20 - Map the pathways through which elevated renin...Ch. 20 - Why is it more efficient to put ACE in the...Ch. 20 - Incorporate the thirst reflex into Figure 20.8.Ch. 20 - CO2+H2OH++HCO3(6) In equation 6, the amount of...Ch. 20 - Why is ATP required for H+ secretion by the H+-K+...Ch. 20 - In hypokalemia, the intercalated cells of the...Ch. 20 - What is an electrolyte? Name five electrolytes...Ch. 20 - Prob. 2RQCh. 20 - Prob. 3RQCh. 20 - List the receptors that regulate osmolarity, blood...Ch. 20 - How do the two limbs of the loop of Henle differ...Ch. 20 - Prob. 6RQCh. 20 - Prob. 7RQCh. 20 - Prob. 8RQCh. 20 - Write out the words for the following...Ch. 20 - Prob. 10RQCh. 20 - Prob. 11RQCh. 20 - Prob. 12RQCh. 20 - Prob. 13RQCh. 20 - Prob. 14RQCh. 20 - Prob. 15RQCh. 20 - When ventilation increases, what happens to...Ch. 20 - Prob. 17RQCh. 20 - Figures 20.15 and 20.18a show the respiratory and...Ch. 20 - Explain how the loop of Henle and vasa recta work...Ch. 20 - Prob. 20RQCh. 20 - Prob. 21RQCh. 20 - Name the four main compensatory mechanisms for...Ch. 20 - Prob. 23RQCh. 20 - Compare and contrast the terms in each set: a....Ch. 20 - Prob. 25RQCh. 20 - Prob. 26RQCh. 20 - Prob. 27RQCh. 20 - Hannah, a 31-year-old woman, decided to have...Ch. 20 - Prob. 29RQCh. 20 - The Henderson-Hasselbalch equation is a...Ch. 20 - Prob. 31RQCh. 20 - Osmotic diuresis refers to the loss of additional...
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