Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 51.4, Problem 4R
Summary Introduction
To review:
The difference in the composition of urine and the blood in the human body.
Introduction:
The blood is taken to kidneys for purification and removal of useless molecules. The original glomerular filtrate is almost similar to the blood but as soon as it moves along the renal tubule for further filtration, the composition starts changing. The tubular fluid is excreted out as urine which is very different from blood.
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Students have asked these similar questions
What chemical substances normally are present in urine?
How are the processes of reabsorption and secretion related?
A) Materials move in opposite directions: reabsorption moves materials into the blood,
whereas secretion removes them from the blood.
B) They both involve movement of material from the tubular fluid into the blood.
C) Materials move in opposite directions: secretion moves materials into the blood,
whereas reabsorption removes them from the blood.
D) They both involve movement of material from the blood into the tubular fluid.
If blood is present in your urine, what does it indicate?
Chapter 51 Solutions
Life: The Science of Biology
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- Why is excretion important in order to achieve osmotic balance?arrow_forwardWhat happens to urine concentration and volume when a person is dehydrated? (Please explain what specifically occurs in the kidneys)arrow_forwardThe urinary system regulates blood volume and pressure by : (a) adjusting the volume of water lost in the urine. (b) releasing erythropoietin. (c) releasing renin. (d) a, b, and c are correct.arrow_forward
- Which of the following substances does the body normallyretain? Which does it normally excrete? (1) glucose, (2) sodiumions, (3) bicarbonate ions, (4) acidsarrow_forwardWhich do you have more of, extracellular or intracellular fluid? Plasma or interstitial fluid?arrow_forwardFind how urine flow, urine volume, pH of urine, specific gravity, and silver nitrate affects people who are: a) dehydrated b) normal hydrated c) overhydrated Include information about urinary system and its hormones in the answer.arrow_forward
- When dehydration occurs, (a) water reabsorption at the kidneys accelerates.(b) fluids are reabsorbed from the interstitial fluid. (c) blood osmotic pressure increases. (d) a, b, and c are correct.arrow_forwardWhat is the name of the capillary bed in the kidneys that makes it possible to form concentrated urine?arrow_forwardThe glomerulus differs from other capillaries in the body in that it Question options: a) is impermeable to most substances c) has a blood pressure much higher than other capillaries e) has a basement membranearrow_forward
- The pH value of the body is regulated in the kidneys by ___________ by ______________. a) Reabsorption, carbon dioxide b) The secretion, carbon dioxide c) The secretion, hydrogen ions d) Reabsorption, hydrogen ionsarrow_forwardWhich of the following correctly describes the path of fluid flow in the kidney? a) Minor calyx; Major calyx; Nephron: Collecting duct b) Collecting duct; Nephron; Major Calyx; Minor Calyx Od Nephron; Collecting duct; Minor Calyx: Major Calyx d) Nephron; Minor Calyx; Collecting duct; Major calyxarrow_forwardHow is the urine affected when the body compensates for respiratory alkalosis (which can occur when the lungs too efficiently get rid of the carbon dioxide present in the blood, for example during hyperventilation)?arrow_forward
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