Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Textbook Question
Chapter 19.4, Problem 8CC
Why is the osmotic pressure of plasma in efferent arterioles higher than that in afferent arterioles?
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Why does having water and blood flow in opposite directions increase transfer efficiency?
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Afferent
Efferent
To increase pressure
To decrease pressure
Chapter 19 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 19.1 - Ion regulation is a key feature of kidney...Ch. 19.1 - What happens to the force of cardiac contraction...Ch. 19.2 - If net filtration out of glomerular capillaries...Ch. 19.2 - If net reabsorption into peritubular capillaries...Ch. 19.3 - Name one way in which filtration and secretion are...Ch. 19.3 - A water molecule enters the renal corpuscle from...Ch. 19.3 - Prob. 7CCCh. 19.4 - Why is the osmotic pressure of plasma in efferent...Ch. 19.4 - If a hypertensive persons blood pressure is...Ch. 19.4 - If systemic blood pressure remains constant but...
Ch. 19.4 - A person with cirrhosis of the liver has...Ch. 19.7 - If plasma creatinine = 1.8 mg/100 mL plasma, urine...Ch. 19 - List and explain the significance of the five...Ch. 19 - List and explain the six major kidney functions.Ch. 19 - At any given time, what percentage of cardiac...Ch. 19 - Prob. 4RQCh. 19 - Arrange the following structures in the order that...Ch. 19 - Name the three filtration barriers that solutes...Ch. 19 - Prob. 7RQCh. 19 - What does the abbreviation GFR stand for? What is...Ch. 19 - Identify the following structures, then explain...Ch. 19 - In which segment of the nephron does most...Ch. 19 - Match each of the following substances with its...Ch. 19 - Prob. 12RQCh. 19 - Prob. 13RQCh. 19 - Prob. 14RQCh. 19 - Map the following terms. You may add terms if you...Ch. 19 - Define, compare, and contrast the items in the...Ch. 19 - What are the advantages of a kidney that filters a...Ch. 19 - Prob. 18RQCh. 19 - Diagram the micturition reflex. How is this reflex...Ch. 19 - Antimuscarinic drugs are the accepted treatment...Ch. 19 - Draw a section of renal tubule epithelium showing...Ch. 19 - Prob. 22RQCh. 19 - Read the box on hemodialysis on p. 603 and see if...Ch. 19 - Graphing question: You are given a chemical Z and...Ch. 19 - Prob. 25RQCh. 19 - Prob. 26RQCh. 19 - Dwight was competing for a spot on the Olympic...Ch. 19 - You are a physiologist taking part in an...Ch. 19 - If 140 liters of plasma are filtered in a day, and...
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- What effect does digitalis have on the Na and K gradients? Why?arrow_forwardHow the sodium potassium pump works in primary active transport?The renin angiotensin aldosterone system is responsible for the regulation of ?What action is initiated when lymph enters a lymph node through the afferent vessel?arrow_forwardWhy is excretion important in order to achieve osmotic balance?arrow_forward
- the major difference between plasma and interstitial fluid is the absence of plasma proteins from the interstitial. explain how this affects solute distrbution and what kind of correction you would do it if you were measuring solute concentrationarrow_forwardCertain diseases, kidney trauma, heavy metals, and some bacterial toxins can damage the filtration membrane. What effect would this have on relative permeability of the membrane and the substances that are filtered?arrow_forwardBlood volume must be restored in a person who has lost large amounts of blood due to serious injury. This is often accomplished by infusing isotonic NaCl solution into the blood. Why is this more effective than infusing an isoosmotic solution of a penetrating solute, such as urea?arrow_forward
- Give the steps in the renin angiotensin pathway from start to finish.arrow_forwardOne model of the glomerular membrane is a microporous membrane in which right cylindrical pores penetrate all the way through the membrane. Assume that the pores have a length of 50 nm and a radius of 3.5 nm. The viscosity of plasma is 0.002 Pa s. The average hydrostatic pressure in the glomerulus is 60 mm Hg, hydrostatic pressure in Bowman's space is 20 mm Hg and the average oncotic pressure of glomerular capillary blood is 28 mm Hg. A. Calculate the flow through a single pore assuming laminar flow (use the Poiseuille flow equation) B. How many pores would there have to be to produce a normal GFR? C. If the total aggregate area of the kidneys for filtration is 1.5 m2, what is the density of the pores (number of pores per unit area)? D. What fraction of the area is present as pores?arrow_forwardWhy does exogenous erythropoietin (EPO) effectively treat anemia due to renal failure but is ineffective in treating the other four types?arrow_forward
- If a substance in the blood is filtered, and not all of it is completely reabsorbed back into the blood, does its level in the blood increase, decrease, or stay the same? Explain.arrow_forwardDiscuss the causes of the increase in fluid level in "vessel A," which is isolated from "vessel B" by a semi-permeable barrier.arrow_forwarddescribe the mechanisms responsible for the medullary osmotic gradientarrow_forward
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