Human Physiology: An Integrated Approach (8th Edition)
Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 23, Problem 18RQ

a.

Summary Introduction

To determine: The amount of Ca2+ a person filters in a day.

Introduction: GFR (glomerular filtration rate) describes the amount of fluid that filters into Bowman’s capsule per unit time.

b.

Summary Introduction

To determine: The amount of Ca2+ a person must excrete to balance the Ca2+ level in the body.

Introduction: The total body Ca2+ is all the calcium in the body, which is distributed among three compartments: extracellular fluid, intracellular Ca2+, and extracellular matrix (bone).

c.

Summary Introduction

To determine: The percentage of filtered Ca2+ to be reabsorbed by the renal tubule.

Introduction: The Ca2+ loss from the body occurs primarily through the kidneys, with a small amount excreted in feces.

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Given: For urea, the rate of excretion equals to the GFR times the urea concentration in plasma. (A) If the urea concentration in plasma is 4.5 mmol/l, what GFR (in l/day) would correspond to an excretion rate of 450 mmol/day. (B) If the urea clearance is 70 ml/min and the GFR is 125 ml/min, what fraction of urea is being reabsorbed. (answer A and B)
Individuals with a rare condition called diabetes insipidus do not produce vasopressin. How would urine output of an individual with diabetes insipidus compare with that of a healthy individual?
Which of the following is TRUE about glucose reabsorption in the kidney? a.If an individual does not have diabetes mellitus, 100% of filtered glucose is reabsorbed at the proximal convoluted tubule. b.If an individual has diabetes mellitus, filtered glucose will be present in all the renal tubule. c.Glucose reabsorption along the proximal convoluted tubule uses the sodium glucose secondary active transporter and it is independent of insulin. d.All of the above e.None of the above    asap
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