Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 10: Problem 23

Reabsorption of the glomerular filtrate occurs primarily at the a. proximal convoluted tubule. b. distal convoluted tubule. c. loop of the nephron. d. collecting duct.

Short Answer

Expert verified
The reabsorption of the glomerular filtrate occurs primarily at the proximal convoluted tubule (PCT), which is responsible for reabsorbing approximately 65% of the filtrate.

Step by step solution

01

Understanding the Nephron

The nephron is the functional unit of the kidney and is responsible for filtering blood and removing waste. It comprises different segments, namely the glomerulus, proximal convoluted tubule, loop of the nephron (also known as the loop of Henle), distal convoluted tubule, and collecting duct.
02

Proximal Convoluted Tubule

The proximal convoluted tubule (PCT) is the first segment of the renal tubule. It is involved in the reabsorption of water, glucose, amino acids, and ions such as sodium, chloride, and potassium. Approximately 65% of the filtrate is reabsorbed in this segment.
03

Loop of the Nephron

The loop of the nephron, also called the loop of Henle, is responsible for establishing and maintaining the medullary concentration gradient, which plays a vital role in regulating urine concentration. This segment reabsorbs approximately 15% of the filtrate.
04

Distal Convoluted Tubule

The distal convoluted tubule (DCT) is involved in fine-tuning the composition of the filtrate and is the primary site for the action of aldosterone, a hormone responsible for regulating sodium reabsorption. The DCT reabsorbs around 5% of the filtered water and salt.
05

Collecting Duct

The collecting duct is the final segment of the nephron, and it plays a crucial role in regulating the concentration of urine. The reabsorption of water in the collecting duct is regulated by the hormone vasopressin.
06

Identifying the Primary Site for Reabsorption

Based on the roles and reabsorption percentages for each segment, it is evident that the proximal convoluted tubule (PCT) is primarily responsible for the reabsorption of glomerular filtrate as it reabsorbs approximately 65% of the filtrate. So the correct answer is: a. proximal convoluted tubule.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

The function of erythropoietin is a. reabsorption of sodium ions. b. excretion of potassium ions. c. reabsorption of water. d. to stimulate red blood cell production. e. to increase blood pressure.

Explain how an artificial kidney machine and continuous ambulatory peritoneal dialysis work to cleanse the blood. (pages \(222-23\) )

Which of the following materials would not normally be filtered from the blood at the glomerulus? a. water b. urea c. protein d. glucose e. sodium ions

Which of the following is not correct? a. Uric acid is produced from the breakdown of amino acids. b. Creatinine is produced from breakdown reactions in the muscles. c. Urea is the primary nitrogenous waste of humans. d. Ammonia results from the deamination of amino acids.

Sodium is actively extruded from which part of the nephron? a. descending portion of the proximal convoluted tubule b. ascending portion of the loop of the nephron c. ascending portion of the distal convoluted tubule d. descending portion of the collecting duct
See all solutions

Recommended explanations on Biology Textbooks

Chemistry of Life

Read Explanation

Genetic Information

Read Explanation

Plant Biology

Read Explanation

Biological Molecules

Read Explanation

Biological Structures

Read Explanation

Biological Organisms

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free