Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Question
Chapter 5, Problem 25RQ
Summary Introduction
To draw: A diagram of an epithelial cell that is capable of absorbing Na+, but lacks the ability to absorb water.
Introduction: A cell membrane is a semi-permeable membrane which allows the entry of a few molecules that are small in size. The larger molecules such as ions and proteins are transported to or from the cell through specialized gateways called channels. These channels have high specificity and allow the entry or exit of specific molecules.
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Chapter 5 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 5.1 - If the 58-kg Reference Woman has total body water...Ch. 5.1 - A mother brings her baby to the emergency room...Ch. 5.1 - Prob. 6CCCh. 5.1 - Two compartments are separated by a membrane that...Ch. 5.1 - Prob. 8CCCh. 5.1 - Prob. 9CCCh. 5.1 - Prob. 10CCCh. 5.3 - If the distance over which a molecule must diffuse...Ch. 5.3 - Prob. 12CCCh. 5.3 - Which is more likely to cross a cell membrane by...
Ch. 5.3 - Prob. 14CCCh. 5.3 - Prob. 15CCCh. 5.3 - Prob. 16CCCh. 5.4 - Positively charged ions are called _____, and...Ch. 5.4 - Name four functions of membrane proteins.Ch. 5.4 - Prob. 19CCCh. 5.4 - Prob. 20CCCh. 5.4 - If a channel is lined with amino acids that have a...Ch. 5.4 - Prob. 22CCCh. 5.4 - Liver cells (hepatocytes) are able to convert...Ch. 5.4 - Prob. 24CCCh. 5.5 - What would you call a carrier that moves two...Ch. 5.5 - Prob. 26CCCh. 5.5 - Prob. 27CCCh. 5.5 - Name the two membrane protein families associated...Ch. 5.5 - Prob. 29CCCh. 5.6 - Prob. 30CCCh. 5.6 - Prob. 31CCCh. 5.6 - Prob. 32CCCh. 5.6 - Prob. 33CCCh. 5.7 - Prob. 34CCCh. 5 - Using what you learned about the naming...Ch. 5 - Prob. 2CCCh. 5 - Prob. 3CCCh. 5 - Prob. 1RQCh. 5 - Distinguish between active transport and passive...Ch. 5 - Which of the following processes are examples of...Ch. 5 - List four factors that increase the rate of...Ch. 5 - List the three physical methods by which materials...Ch. 5 - A cotransporter is a protein that moves more than...Ch. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - What determines the osmolarity of a solution? In...Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - The membrane potential at which the electrical...Ch. 5 - Prob. 16RQCh. 5 - Create a map of transport across cell membranes...Ch. 5 - Draw a large rectangle to represent the total body...Ch. 5 - What factors influence the rate of diffusion...Ch. 5 - Define the following terms and explain how they...Ch. 5 - Prob. 21RQCh. 5 - Prob. 22RQCh. 5 - Prob. 23RQCh. 5 - Prob. 24RQCh. 5 - Prob. 25RQCh. 5 - Prob. 26RQCh. 5 - The following terms have been applied to membrane...Ch. 5 - Prob. 28RQCh. 5 - NaCl is a nonpenetrating solute and urea is a...Ch. 5 - Prob. 30RQCh. 5 - Prob. 31RQCh. 5 - What is the osmolarity of half-normal saline (=...Ch. 5 - Prob. 33RQCh. 5 - Prob. 34RQ
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- Two solutions are separated by a semipermeable membrane that is permeable only to water. The two solutions are: Solution A = 150 mM KCl Solution B = 150 mM Angiotensin (a 7 amino acid polypeptide) Which of the following would best explain the net movement in this situation? - water will move from the KCl side to Angiotensin side - water will move from Angiotensin side to KCl side - The Cl- ion will move to the angiotensin side until there is 75 mM Cl- on each side - Since Angiotensin is not an ion, it can move through the membrane - There is no net water movement as the concentrations are the same on both sidesarrow_forwardADH, by itself, cannot reduce an increase in osmolality in body fluids. Why not? What other mechanism is required?arrow_forwardBy what mechanism does the active transport of Na1 lead to the osmotic flow of water across an epithelium?arrow_forward
- An athlete is sweating profusely but does not rehydrate. The changing conditions are detected by osmoreceptors in the hypothalamus.Select the 4 conditions associated with loss of water and the response it triggers. Increased solute concentration Decreased solute concentration Increased blood volume Decreased blood volume Increased blood pressure Decreased blood pressure Increased release of ADH Decreased release of ADHarrow_forwardOne of your patients is diagnosed with nephrotic syndrome in which too much protein is released in the urine. From a urine sample you can see high level albumin in the urine. Explain why this is problematic for bulk fluid flow in the body and why it is causing edema.arrow_forwardDrinking alcohol inhibits ADH secretion. What effect will drinking a beer have on the permeability of kidney tubules to sodium? To water?arrow_forward
- Mannitol is a sugar that does not pass through the walls of capillaries in the brain. It also does not cross the wall of kidney tubules, the structures that transport blood filtrate to become urine. Explain why mannitol can be considered as osmotically active. How might its clinical administration help to prevent swelling of the brain in head trauma? Also, explain the effect it might have on the water content of urine.arrow_forwardAn athlete is sweating profusely but does not rehydrate. The changing conditions are detected by osmoreceptors in the hypothalamus.Select the four conditions associated with loss of water and the response it triggers. Increased solute concentration Decreased solute concentration Increased blood volume Decreased blood volume Increased blood pressure Decreased blood pressure Increased release of ADH Decreased release of ADHarrow_forwardDuring severe exertion in hot environment, a person can lose up to 3L of sweat per hour. What effect would this loss have on urine concentration and rate of production? Explain the mechanism involvedarrow_forward
- Name the substance responsible for most of the osmoticpressure of the extracellular fluid.arrow_forwardWhich of the following best describes the changes between dilute (osmolarity 50mOsm/Kg) andconcentrated urine (osmolarity 1200mOsm/Kg)? a. Concentrated urine has more water than NaCl moleculesb. Concentrated urine has less water than NaCl moleculesc. Dilute urine has more NaCl than water moleculesd. Dilute urine has less water than NaCl moleculesarrow_forward6) Consider the mechanism of net NaCl secretion across an epithelium shown below: b) What is the driving force for Na+ transport through the paracellular pathway? c) What is the significance of K+ channels located on the basolateral membrane?arrow_forward
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