Neco Model Questions Vol1 2025 Biology Question 6

Practice essay / theory question 6 from the 2025 Neco Model Questions Vol1 Biology examination. This question covers excretion, urinary system, kidney .

Neco Model Questions Vol1 2025 Biology Essay / Theory
Topics: excretion urinary system kidney
Question 6 NECO_MODEL_QUESTIONS_VOL1 • 2025 • BIOLOGY • essay
Neco Model Questions Vol1 2025 Biology Question 6 diagram

The diagram shows a longitudinal section of a human kidney with the major regions and the nephron components numbered 1–8.

Question Parts

( a )
Write the correct name of each structure indicated by the numbers 1–8 on the diagram.
( b )
State the primary function of each of the following nephron parts in urine formation:
( ) Glomerulus
( ) Proximal convoluted tubule
( ) Loop of Henle
( ) Distal convoluted tubule
( ) Collecting duct
( c )
Explain how antidiuretic hormone (ADH) modifies the activity of the collecting duct to influence urine concentration. Include the role of water‑permeable channels and the medullary osmotic gradient.
( d )
A congenital defect shortens the loop of Henle by 40 % of its normal length. Predict the likely effect on the kidney’s ability to produce highly concentrated urine and give a physiological explanation.

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About This Question

This is Neco Model Questions Vol1 2025 Biology Question 6. It is one of the essay questions from the 2025 Neco Model Questions Vol1 Biology examination.

The question covers excretion, urinary system, kidney .

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