
Introduction:
The kidney gland filters the ions, metabolites and excretes the

Answer to Problem 1A
Correct answer:
The acid-base balance in the kidney is maintained by the exchange of hydrogen and bicarbonate ions in the nephrons of the kidney. The movement of ions takes place across the ion channel receptors called as aquaporins in the membrane. Therefore, option (c) is correct.
Explanation of Solution
Reason for the correct statement:
The excretion of the metabolite urea is not related to the maintenance of acid-base balance in the kidney. The excretion of nitrogenous wastes like urea takes place as a result of the byproduct formed in the urea cycle. The acidbase balance is maintained by the movement of hydrogen and bicarbonate ions in the tubules and interstitial fluid.
Option (c) is given as “maintains the acid-base balancerids the body of uric acid”.
As “the acid-base balance is regulated by the movement of the bicarbonate and hydrogen ions across the membrane of the nephrons and peritubular capillaries”, it is the right answer.
Hence, option (c) is correct.
Reasons for the incorrect statements:
Option (a) is given as “excretes metabolic wastesrids the body of urea”.
The metabolic wastes are excreted from the kidney through the urine like urea. As the mentioned statement is correct, so it is a wrong answer.
Option (b) is given as “maintains the watersalt balance-helps regulate blood pressure”.
The water salt balance is maintained by the secretion of hormone aldosterone from adrenal gland and anti-diuretic hormone from posterior pituitary gland. The secretion of aldosterone maintains the concentration gradient of ions in the tubules. The secretion of anti-diuretic hormone causes the reabsorption of the water in the distal convoluted tubules and collecting duct. As the mentioned statement is correct, so it is a wrong answer.
Option (d) is given as “secretes hormonessecretes erythropoietin”.
The synthesis of t red blood cells is caused by the secretion of the erythropoietin hormone. As the mentioned statement is correct, so it is a wrong answer.
Hence, options (a), (b) and (d) are incorrect.
The acid-base balance is maintained in the kidney by the movement of hydrogen and bicarbonate ions in the nephrons of the kidney. This balance is not related to the excretion of the urea from the body. The excretion of nitrogenous wastes takes place in the urine as a result of the byproduct of the urea cycle.
Want to see more full solutions like this?
Chapter 11 Solutions
Human Biology
- can you help? I think its B but not surearrow_forwardSkip to main content close Homework Help is Here – Start Your Trial Now! arrow_forward search SEARCH ASK Human Anatomy & Physiology (11th Edition)BUY Human Anatomy & Physiology (11th Edition) 11th Edition ISBN: 9780134580999 Author: Elaine N. Marieb, Katja N. Hoehn Publisher: PEARSON 1 The Human Body: An Orientation expand_moreChapter 1 : The Human Body: An Orientation Chapter Questions expand_moreSection: Chapter Questions Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,... format_list_bulletedProblem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,... See similar textbooks Bartleby Related Questions Icon Related questions Bartleby Expand Icon bartleby Concept explainers bartleby Question Draw a replication bubble with two replication forks.blue lines are DNA single strands and red lines are RNA single strands.indicate all 3' and 5’ ends on all DNA single…arrow_forwardProvide an answerarrow_forward
- Question 4 1 pts Which of the following would be most helpful for demonstrating alternative splicing for a new organism? ○ its proteome and its transcriptome only its transcriptome only its genome its proteome and its genomearrow_forwardIf the metabolic scenario stated with 100 mM of a sucrose solution, how much ATP would be made then during fermentation?arrow_forwardWhat is agricuarrow_forward
- When using the concept of "a calorie in is equal to a calorie out" how important is the quality of the calories?arrow_forwardWhat did the Cre-lox system used in the Kikuchi et al. 2010 heart regeneration experiment allow researchers to investigate? What was the purpose of the cmlc2 promoter? What is CreER and why was it used in this experiment? If constitutively active Cre was driven by the cmlc2 promoter, rather than an inducible CreER system, what color would you expect new cardiomyocytes in the regenerated area to be no matter what? Why?arrow_forwardWhat kind of organ size regulation is occurring when you graft multiple organs into a mouse and the graft weight stays the same?arrow_forward
- What is the concept "calories consumed must equal calories burned" in regrads to nutrition?arrow_forwardYou intend to insert patched dominant negative DNA into the left half of the neural tube of a chick. 1) Which side of the neural tube would you put the positive electrode to ensure that the DNA ends up on the left side? 2) What would be the internal (within the embryo) control for this experiment? 3) How can you be sure that the electroporation method itself is not impacting the embryo? 4) What would you do to ensure that the electroporation is working? How can you tell?arrow_forwardDescribe a method to document the diffusion path and gradient of Sonic Hedgehog through the chicken embryo. If modifying the protein, what is one thing you have to consider in regards to maintaining the protein’s function?arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education





