Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 49, Problem 8TY
Summary Introduction
Introduction: To maintain the homeostasis and osmoregulatory balance, excretion and reabsorption of certain ions occur in the collecting duct and distal tubule. The reabsorption process is mediated by two hormones: ADH and aldosterone.
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Chapter 49 Solutions
Biology
Ch. 49.1 - Prob. 1CCCh. 49.2 - Core Skill: Connections In what other organ is a...Ch. 49.2 - Prob. 2CSCh. 49.2 - Prob. 3CSCh. 49.3 - Prob. 1CSCh. 49 - Prob. 1TYCh. 49 - Prob. 2TYCh. 49 - Prob. 3TYCh. 49 - Prob. 4TYCh. 49 - Prob. 5TY
Ch. 49 - Prob. 6TYCh. 49 - Prob. 7TYCh. 49 - Prob. 8TYCh. 49 - Prob. 9TYCh. 49 - Prob. 10TYCh. 49 - Define nitrogenous waste, and list the main types...Ch. 49 - List and describe the three processes involved in...Ch. 49 - Prob. 3CQCh. 49 - Prob. 1COQCh. 49 - Briefly discuss the parts and functions of the...
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- 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_forwardIncreased concentrations of aldosterone lead to ... a) Increased reabsorption of Na + b) Decreased blood volume c) Increased permeability to water in distal tubules d) Decreased reabsorption of Cl-arrow_forward
- Renin is released from the JG apparatus in response to A) low blood pressure or decreased NaCI in the fluid within the distal convoluted tubule. B) high blood pressure or increased NaCI in the fluid within the distal convoluted tubule. C) high blood pressure or decreased NaCI in the fluid within the distal convoluted tubule. D) low blood pressure or increased NaCI in the fluid within the distal convoluted tubule.arrow_forwardwhich of the following is a response to the release of antidiuretic hormone? a. urine volume increases b. positive feedback occurs leading to the release of more ADH c. water reabsorption increases at the collecting duct d. blood osmolarity increasesarrow_forwardIncreased aldosterone causesa. increased reabsorption of Na+.b. decreased blood volume.c. decreased reabsorption of Cl−.d. increased permeability of the distal convoluted tubule to water.e. increased volume of urine.arrow_forward
- Glomerular filtration can be increased by which of the following? A. Increasing blood flow via afferent arteriole B. Decreasing blood flow via afferent arteriole C. Decreasing arterial blood pressure D. Increasing blood flow via efferent arteriole The answer is (A) Increasing blood flow via afferent arteriole. Please explain why it is not the other options (B,C,D)arrow_forwardThe hormone ANP is released from the heart and causes the urinary system to A) decrease urine volume and increase blood volume. B) increase urine volume and blood volume. C) decrease urine volume and blood volume. D) increase urine volume and decrease blood volume.arrow_forwardWhich of the following describes why a very low GFR is not beneficial? a. Too many substances including wastes will be reabsorbed due to the reduced flow b. Filtered substances will pass by too quickly to be adequately reabsorbed c. There will be insufficient secretion of substances in the peritubular capillaries d. A low GFR is always beneficialarrow_forward
- How would damage to the renal capillaries resulting in an increase in protein filtration and urinary excretion affect net filtration pressure in the systemic circulation? a. Increase capillary reabsorption due to an increase in interstitial colloid osmotic pressure b. Increase capillary filtration due to an increase in interstitial hydrostatic pressure c. Increase capillary filtration due to a decrease in blood colloid osmotic pressure d. Increase capillary reabsorption due to increased blood hydrostatic pressurearrow_forwardWhen arterial blood pressure drops below normal, which renal function occur as a result of sympathetic nervous system activation? a. Afferent arteriole vasodilation b. Decreased ADH secretion c. Decreased renin secretion d. Afferent arteriole vasoconstrictionarrow_forwardIf the glomerular filtration rate is too high: A) Needed substances cannot be reabsorbed quickly enough and are lost in the urine B) The filtrate passes through the nephron tubules without secretion C) Little or nothing is reabsorbed and the urine is high in ammonia and uric acid D) The filtrate passes through the nephron tubules more slowly than normal E) None of these answers is correctarrow_forward
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