Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 48, Problem 2TYK
Summary Introduction
Introduction:
The secretion in which the blood is filtered from urine that contains liquid waste from peri-tubular capillaries to renal tubular lumen, is known as tubular secretion. In this process, filtration and secretion play a major role in eliminating waste substances from the blood. Filtration is a nonselective process whereas tubular secretion is a selective process.
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Vasopressin is a hormone that is mainly released when the body lacks water. The release of vasopressin causes the kidneys to conserve water by concentrating urine and decreasing urine output. However, vasopressin also has additional functions in other tissues such as the brain and blood vessels, which are not directly involved in urine production. How might vasopressin trigger different responses in different tissues?
Reabsorption of most solute molecules from the proximal convolutedtubule is linked to the active transport of Na+ across thea. apical membrane and out of the cell.b. apical membrane and into the cell.c. basal membrane and out of the cell.d. basal membrane and into the cell.
a pt has hyperthyroidism and his Na+/K+ ATpase pumps are working slower. Will this effect the transport of Na+?
A. There will be a reduction in Na+ transport on the basolateral side of the tubule epithelial cell.
B. there will be a reduction in Na+ transport in bowmans capsule epithelial cells
C. there will be no change to Na+ transport
D. there will be a reduction in ATP-dependent, Na+transport on the apical side of the tubule epithelial cells
E. there will be a reduction of Na+ secretion on both sides of the tubule epithelial cells
Chapter 48 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 48.1 - Define the terms osmosis, osmolarity, hypoosmotic,...Ch. 48.2 - How are protonephridia, metanephridia, and...Ch. 48.3 - Prob. 1SBCh. 48.3 - Prob. 2SBCh. 48.4 - Prob. 1SBCh. 48.5 - Prob. 1SBCh. 48.5 - Reptiles and birds excrete nitrogenous wastes in...Ch. 48.6 - Distinguish between ectothermy and endothermy....Ch. 48.7 - Prob. 1SBCh. 48.7 - Prob. 2SB
Ch. 48.8 - Prob. 1SBCh. 48 - Which of the following statements about...Ch. 48 - Prob. 2TYKCh. 48 - Prob. 3TYKCh. 48 - Prob. 4TYKCh. 48 - Prob. 5TYKCh. 48 - Which of the following correctly describes a part...Ch. 48 - Which of the following is an example of...Ch. 48 - Prob. 8TYKCh. 48 - Prob. 9TYKCh. 48 - Prob. 10TYKCh. 48 - Prob. 11TYKCh. 48 - Discuss Concepts As a person ages, nephron tubules...Ch. 48 - Prob. 13TYKCh. 48 - Prob. 14TYKCh. 48 - Prob. 15TYKCh. 48 - Prob. 16TYKCh. 48 - Prob. 1ITDCh. 48 - Prob. 2ITDCh. 48 - Prob. 3ITD
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- As the text noted, two-thirds of the water and solutes that the body reclaims by reabsorption in nephrons occurs in the proximal tubule. Proximal tubule cells have large numbers of mitochondria and demand a great deal of oxygen. Explain why.arrow_forwardWhich of the following does not contribute to the high salt concentration in the interstitial fluid of the kidney medulla? (a) active transport of sodium from the upper part of the ascending limb (b) diffusion of salt from the ascending limb of the loop of Henle (c) reabsorption of salt from various regions of Bowmans capsule (d) counterflow of fluid through the two limbs of the loop of Henle (e) diffusion of urea out of the collecting ductarrow_forwardWhy is excretion important in order to achieve osmotic balance?arrow_forward
- Fatty tissue holds the kidneys in place. Extremely rapid weight loss may cause this tissue to shrink so that the kidneys slip from their normal position. On rare occasions, the slippage can put a kink in one or both ureters and block urine flow. Suggest what might then happen to the kidneys.arrow_forwardFigure 41.8 Loop diuretics are drugs sometimes used to treat hypertension. These drugs inhibit the reabsorption of Na+ and Cl- ions by the ascending limb of the loop of Henle. A side effect is that they increase urination. Why do you think this is the case?arrow_forwardAntidiuretic hormone (ADH) is produced in the pituitary gland and regulates the body's fluid volume and osmolality by affecting the number of active aquaporins (water channels) in the proximal tubules and the collecting duct. But what is it, above all, that drives the filtrate out of the tubules? a) Osmotic pressure formed depending on the composition of the filtrate b) Osmotic gradient in the medullary (kidney marrow) c) Hydrostatic pressure from the filtrate in tubules d) Blood pressure in the capillaryarrow_forward
- Which of the following is a function of the kidneys? a. The kidneys remove harmful substances from the body. b. The kidneys recapture water for use by the body. c. The kidneys regulate the levels of salt in the blood. d. All of the choices are correct.arrow_forwardWhich of these is not a function of the kidneys? A) The kidneys regulate the plasma volume B) The kidneys help to regulate blood pressure C) The kidneys help control the rate of red blood cell production D) The kidneys deactivate vitamin D and stimulate the activity of osteoclastsarrow_forwardA pt was born with a rare genetic disorder in which the proximal tubules of her nephrons express half the number of aquaporins as normal. What will result? A. reduced reabsorption of water, although as much reabsorption of Na+ as is typical? b. reduced reabsorption of water, Na+ and glucose in the proximal tubules? c. Reduced reabsorption of both water and Na+ in equal proportions? D. Reduced reabsorption of all materials in the proximal tubules.arrow_forward
- 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 asaparrow_forwardWhich one of the following statements is false?a. Blood pressure in the glomerular capillaries is greater than the osmotic pressure exerted by proteins in the plasma within the glomerular capillaries.b. If the osmotic pressure exerted by solutes in the peritubular capillaries is greater than the blood pressure in those capillaries, then water will be reabsorbed.c. Endothelial cells in glomerular capillaries are highly permeable, facilitating filtration of fluid into Bowman’s capsule.d. Constriction of the afferent arteriole is likely to reduce the volume of filtrate appearing in Bowman’s capsule.e. The efferent arteriole carries blood from the glomerular capillaries directly to the renal vein.0.5 pointsQuestion 2Your doctor calls with the results of your urinalysis and tells you that they found proteinuria, the presence of abnormal amounts of protein in your urine sample. What could have caused this?a. Infection and inflammation in the kidney.b. Abnormally high concentration of plasma…arrow_forwardWhich of the following is false about water reabsorption at the kidneys: a). Water is actively pumped from the tubules into the bloodb). A concentration gradient of sodium must be established to move Water c). The loops of Henie allow for water reabsorption d). Water moves through aquaporinsarrow_forward
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