Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 23.6, Problem 15CC
Summary Introduction
To determine: The movement of Ca2+ from the intestine to the extracellular fluid.
Introduction: The Ca2+ are absorbed in the intestine in two ways, one is the transcellular active transport, and the other is passive transport. The active transport is located largely in the duodenum and upper jejunum; and the passive transport functions throughout the length of the intestine.
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Sodium ion reabsorption from the filtrate into peritubular blood across the cells of this component of the nephron (marked by the black asterisk)
Choose from the following:
(A) is regulated by the binding of the hormone aldosterone
(B) is not regulated by any hormone, but is determined by sodium ion concentration and filtrate flow
Name the substance responsible for most of the osmoticpressure of the extracellular fluid.
Which of the following is TRUE concerning glucose transport across the proximal convoluted tubule (PCT)?
Group of answer choices must choose one answer
Glucose is usually absorbed approximately 70% here and the remainder of the absorption is under hormonal control in the distal convoluted tubule (DCT).
Glucose moves by paracellular transport.
Glucose moves across the apical membrane by secondary active transport via co-transport with sodium.
Glucose transport is passive, requiring facilitated diffusion across both the apical and basolateral membranes.
Chapter 23 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 23.2 - Prob. 1CCCh. 23.2 - Prob. 2CCCh. 23.2 - What do the abbreviations HPA and CBG stand for?...Ch. 23.2 - Prob. 4CCCh. 23.2 - Prob. 5CCCh. 23.2 - Prob. 6CCCh. 23.2 - Would someone with Addisons disease have normal,...Ch. 23.2 - Prob. 8CCCh. 23.3 - A woman who had her thyroid gland removed because...Ch. 23.3 - Prob. 10CC
Ch. 23.4 - Prob. 11CCCh. 23.5 - Prob. 12CCCh. 23.5 - Prob. 13CCCh. 23.6 - Prob. 14CCCh. 23.6 - Prob. 15CCCh. 23.6 - Prob. 16CCCh. 23.6 - Prob. 17CCCh. 23 - Name the zones of the adrenal cortex and the...Ch. 23 - For (a) cortisol, (b) growth hormone, (c)...Ch. 23 - Prob. 3RQCh. 23 - Prob. 4RQCh. 23 - Define each of the following terms and explain its...Ch. 23 - Prob. 6RQCh. 23 - Prob. 7RQCh. 23 - Prob. 8RQCh. 23 - Define, compare, and contrast or relate the terms...Ch. 23 - Prob. 10RQCh. 23 - Prob. 11RQCh. 23 - Osteoclasts make acid (H+) from CO2 and H2O. They...Ch. 23 - Prob. 13RQCh. 23 - One diagnostic test to determine the cause of...Ch. 23 - Prob. 15RQCh. 23 - Prob. 16RQCh. 23 - Prob. 17RQCh. 23 - Prob. 18RQCh. 23 - Prob. 19RQ
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- Define sodium–glucose transporter (SGLT)arrow_forwardThe reabsorption of water, Cl–, and glucose by the PCT islinked to the reabsorption of Na+, but in three very different ways. Contrast these three mechanismsarrow_forwardIn a person with diabetes mellitus, what would be causing polyuria? Glucose has saturated the secondary active transporters in the PCT that move glucose into the cells, increasing the concentration gradient between the filtrate and the ISF or Glucose has saturated the secondary active transporters in the PCT that move glucose into the cells, reducing the concentration gradient between the filtrate and the ISFarrow_forward
- A) The two kidneys are located in the abdominal cavity and are primarily responsible the formation of urine, and the regulation of extracellular fluid composition. Identify which blood vessels carry oxygenated - but waste containing - blood into the kidneys. Identify which blood vessels carry deoxygenated - but filtered - blood away from the kidneys. Approximately 1 million nephrons can be found in each kidney and are primarily responsible for the filtration of blood and extracellular fluids, and the production of urine. Nephrons perform three (3) physiological functions as they produce urine - filtration, reabsorption, and secretion. Identify the various structures and their locations, within each nephron, where those three (3) physiological functions are performed. Describe what is happening, in relation to the various components of blood, during the performance of those three (3) physiological functions. Define the term filtrate. Identify the two (2) harmful products excreted by the…arrow_forward(a) Identify the two reactions that allow the kidney to produce NH4+. (b) Which gluconeogenic precursor is thereby generated? Describe thepathway by which it can be converted to glucose.arrow_forwardGiven: A patient’s GFR (glomerular filtration rate) is 125 ml/min, and his urine is produced at a rate of 1.25 ml/min. (A) By what factor is the inulin concentrate in his urine. (B) The concentration of glucose in his plasma is 5 mmol/l. His renal reabsorption of glucose is completely inhibited. What would be the concentration of glucose in his urine? (answer parts a and b)arrow_forward
- Describe at least two mechanisms by which angiotensin II targets the kidneys to increase extracellular fluid volume and, therefore, increase blood pressure.arrow_forwardRenal tubule cells acidify the urine and parietal cells acidify the stomach contents. In each case (a) which intracellular enzyme is key, and (b) blood concentration of which ion increases?arrow_forwardDescribe the activity of the sodium-potassium pumppresent in neurons.arrow_forward
- The presence of either protein or glucose in a urinalysis is abnormal, but these two molecules end up in the urine for different reasons. For each of these molecules, briefly describe where in the urine production process (i.e., glomerular filtration, tubular reabsorption or tubular secretion) the problem occurs, and why it might happen.arrow_forwardSay someone has a blood glucose level of 245 mg/dl. Which statement below would be correct? O They would exhibit glycosuria because the transport maximum of glucose has been exceeded. O They would exhibit glycosuria because of decreased osmosis in the urine collecting duct. O They would not exhibit glycosuria because the transport maximum of glucose has been exceeded. O They would not exhibit glycosuria because of decreased osmosis in the urine collecting duct.arrow_forwardIdentify the mechanism of transport used in this location across the simple cuboidal cell of the proximal convoluted tubule Choose from the following: (A) facilitated diffusion (B) simple diffusion (C) active transport (D) secondary active transportarrow_forward
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