a) Calculate the filtration pressure from the figures given i.e. the net force moving fluid out of th glomerulus. Show your working. Filtration pressure, and therefore the rate at which fluid passes from the glomerulus into the Bowman's capsule, varies with blood pressure. b) If the renal artery was restricted with a clamp so that the blood pressure in the afferent artery fell to about 5.5kPa, what would happen to the production of urine? Give a reason for your deduction. c) A person fasted overnight and then swallowed 75g of glucose. The graph shows the resulting tration of inculin and alucose in the hlood

a) Calculate the filtration pressure from the figures given i.e. the net force moving fluid out of th glomerulus. Show your working. Filtration pressure, and therefore the rate at which fluid passes from the glomerulus into the Bowman's capsule, varies with blood pressure. b) If the renal artery was restricted with a clamp so that the blood pressure in the afferent artery fell to about 5.5kPa, what would happen to the production of urine? Give a reason for your deduction. c) A person fasted overnight and then swallowed 75g of glucose. The graph shows the resulting tration of inculin and alucose in the hlood

Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter20: Urinary System

Section: Chapter Questions

Problem 5RQ

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Water and small solutes enter nephrons during ________. a. filtration b. reabsorption c. secretion d. both a and b
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) podocytes
Which 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 duct
Figure 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.
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.