Neco 2023 Biology Question 6

Practice essay / theory question 6 from the 2023 Neco Biology examination. This question covers excretion, urinary system .

Neco 2023 Biology Essay / Theory

Topics: excretion urinary system

Question 6 NECO • 2023 • BIOLOGY • essay

The labelled diagram shows the human excretory system. Structures are labelled A to I as follows: A – Kidney, B – Ureter, C – Urinary bladder, D – Urethra, E – Nephron, F – Glomerulus, G – Bowman's capsule, H – Loop of Henle, I – Collecting duct.

Question Parts

( a )

Identify each structure labelled A–I in the diagram.

( b )

For each of the following processes, state which part of the nephron is primarily involved and briefly describe its role:

( c )

A patient has a congenital defect that reduces the length of the loop of Henle by 40 %. Discuss how this alteration would affect the kidney’s ability to concentrate urine and explain the physiological mechanism involved.

( d )

The average glomerular filtration rate (GFR) in a healthy adult is 125 mL min⁻¹. Calculate the total volume of filtrate formed in 24 hours. If 99 % of this filtrate is re‑absorbed, determine the volume of urine excreted per day. Show all steps.

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About This Question

This is Neco 2023 Biology Question 6. It is one of the essay questions from the 2023 Neco Biology examination.

The question covers excretion, urinary system .

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