Neco 2022 Biology Question 29

Practice objective / multiple choice question 29 from the 2022 Neco Biology examination.

Neco 2022 Biology Objective / Multiple Choice Hard Difficulty
Question 29 NECO • 2022 • BIOLOGY • objective
Neco 2022 Biology Question 29 diagram

The diagram shows a labelled human nephron. (a) Identify the segment that is primarily responsible for reabsorption of the majority of filtered water. (b) If the glomerular filtration rate (GFR) is \(120\,\text{mL/min}\) and the urine flow rate is \(1.5\,\text{mL/min}\), calculate the overall percentage of filtered water that is reabsorbed in the nephron. (c) Does this calculated percentage support the statement that "the majority of water reabsorption occurs in the segment identified in part (a)"? Provide a brief justification.

Answer Options

Correct Answer A. a) Proximal convoluted tubule; b) 98.75 %; c) Yes - the overall reabsorption is ~98.8 %, confirming that most water is reclaimed in the proximal tubule.
B. a) Loop of Henle; b) 85.00 %; c) No - the overall reabsorption is ~85 %, indicating that most water is reclaimed later in the nephron.
C. a) Distal convoluted tubule; b) 92.50 %; c) Yes - the overall reabsorption is ~92.5 %, suggesting the distal tubule handles the majority of water reabsorption.
D. a) Collecting duct; b) 99.90 %; c) No - the reabsorption percentage is too high to be accounted for primarily by the collecting duct.
Correct Answer
A
Correct Option:
a) Proximal convoluted tubule; b) 98.75 %; c) Yes - the overall reabsorption is ~98.8 %, confirming that most water is reclaimed in the proximal tubule.

About This Question

This is Neco 2022 Biology Question 29. It is one of the objective questions from the 2022 Neco Biology examination.

Difficulty level: Hard .

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