Laboratory Manual for Anatomy & Physiology (6th Edition) (Anatomy and Physiology)
6th Edition
ISBN: 9780134206332
Author: Elaine N. Marieb, Lori A. Smith
Publisher: PEARSON
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Chapter 24, Problem 10SAQ
Explain why the filtrate becomes hypotonic as it flows through the ascending limb of the nephron loop. Also explain why the filtrate at the bend of the nephron loop (and the interstitial fluid of the deep portions of the medulla) is hypertonic.
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Explain why the filtrate becomes hypotonic as it flows through the ascending limb of the nephron loop. Also explain why the filtrate at the bend of the nephron loop (and the interstitial fluid of the deep portions of the medulla) is hypertonic.
Explain why the filtrate becomes hypotonic as it flows through the ascending limb of the nephron loop and why the filtrate at the end of the nephron loop is hypertonic.
Describe the special characteristics of the descending and ascending limbs of the nephron loop that cause the formation of the medullary osmotic gradient.
Chapter 24 Solutions
Laboratory Manual for Anatomy & Physiology (6th Edition) (Anatomy and Physiology)
Ch. 24.1 - Prob. 1CYUCh. 24.1 - From inside to outside, list the three layers of...Ch. 24.1 - The lumen of the ureter is continuous with a space...Ch. 24.2 - Name the tubular components of a nephron in the...Ch. 24.2 - What are the structural differences between...Ch. 24.2 - What type of capillaries are the glomerular...Ch. 24.2 - Prob. 19CYUCh. 24.3 - In the kidneys, tubular secretion of a substance...Ch. 24.4 - Extrinsic and intrinsic controls of GFR serve two...Ch. 24.4 - Calculate net filtration pressure given the...
Ch. 24.4 - Which of the pressures that determine NFP is...Ch. 24.5 - In which part of the nephron does most...Ch. 24.5 - How does the movement of Na+ drive the...Ch. 24.5 - MAKING conections Primary and secondary active...Ch. 24.6 - List several substances that are secreted into the...Ch. 24.7 - Describe the special characteristics of the...Ch. 24.7 - Under what conditions is ADH released from the...Ch. 24.8 - What would you expect the normal clearance value...Ch. 24.8 - What are the three major nitrogenous wastes...Ch. 24.9 - A kidney stone blocking a ureter would interfere...Ch. 24.9 - What is the trigone of the bladder, and which...Ch. 24.9 - Name the three regions of the male urethra.Ch. 24.9 - How does the detrusor respond to increased firing...Ch. 24.9 - MAKING connections Compare the structure and...Ch. 24 - The lowest blood concentration of nitrogenous...Ch. 24 - The glomerular capillaries differ from other...Ch. 24 - Damage to the renal medulla would interfere first...Ch. 24 - Which is reabsorbed by the proximal convoluted...Ch. 24 - Glucose is not normally found in the urine because...Ch. 24 - Filtration at the glomerulus is inversely related...Ch. 24 - Tubular reabsorption (a) of glucose and many other...Ch. 24 - If a freshly voided urine sample contains...Ch. 24 - Conditions such as diabetes mellitus and...Ch. 24 - Which of the following is/are true about ADH? (a)...Ch. 24 - What is the importance of the perirenal fat...Ch. 24 - Trace the pathway a creatinine molecule takes from...Ch. 24 - Explain the important differences between blood...Ch. 24 - Describe the mechanisms that contribute to renal...Ch. 24 - Prob. 5SAQCh. 24 - Describe what is involved in active and passive...Ch. 24 - Explain how the peritubular capillaries are...Ch. 24 - Explain the process and purpose of tubular...Ch. 24 - How does aldosterone modify the chemical...Ch. 24 - Explain why the filtrate becomes hypotonic as it...Ch. 24 - How does urinary bladder anatomy support its...Ch. 24 - Define micturition and describe the micturition...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...Ch. 24 - Lets return to Kyle Boulard, whom we met in the...
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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_forwardWater and small solutes enter nephrons during ________. a. filtration b. reabsorption c. secretion d. both a and barrow_forwardExplain how the kidneys help to maintain the balance of acids and bases in extracellular fluid.arrow_forward
- Which of the following does not contribute to the process of filtration? (a) active transport by epithelial cells lining renal tubules (b) large surface area for filtration (c) low permeability of glomerular capillaries (d) high hydrostatic blood pressure in glomerular capillaries (e) podocytesarrow_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_forwardFigure 41.6 Which of the following statements about the nephron is false? The collecting duct empties into the distal convoluted tubule. The Bowman’s capsule surrounds the glomerulus. The loop of Henle is between the proximal and distal convoluted tubules. The loop of Henle empties into the distal convoluted tubule.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_forwardReabsorption depends on _________. a. osmosis across the nephron wall b. active transport of sodium across the nephron wall c. a steep solute concentration gradient d. all of the abovearrow_forwardWhy is excretion important in order to achieve osmotic balance?arrow_forward
- Nephron Describe the phsiology of the nephron. Explain the function of each structure and how the composition of the urine changes from the Bowmans capsule to the collecting duct. How does the function of nephron differ when the animal has an excess of water, as opposed to when it is dehydrated? How do hormones help regulate the physiology of the nephron? Why is the nephron so highly vascularized?arrow_forwardExplain why fluid in the descending limb of the nephronloop is hypertonic.arrow_forwardThe distal nephron is able to fine-tune sodium and water balance because it can regulate reabsorption of sodium and water independently of each other. This is unlike the proximal nephron, where an increase in sodium reabsorption will lead to an increase in water reabsorption due to the creation of an osmotic gradient and free permeability to both sodium and water. How does vasopressin affect water reabsorption in the distal nephron in response to a negative water balance? Increased circulating vasopressin increases expression of aquaporin on the luminal membrane. O Increased circulating vasopressin decreases expression of aquaporin on the luminal membrane. Decreased circulating vasopressin increases expression of aquaporin on the luminal membrane. Decreased circulating vasopressin decreases expression of aquaporin on the luminal membrane.arrow_forward
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