Waec Model Questions Vol1 2022 Biology Question 6

Practice essay / theory question 6 from the 2022 Waec Model Questions Vol1 Biology examination. This question covers Excretion .

Waec Model Questions Vol1 2022 Biology Essay / Theory

Topic: Excretion

Question 6 WAEC_MODEL_QUESTIONS_VOL1 • 2022 • BIOLOGY • essay

A 25‑year‑old male presents with polyuria and polydipsia. Laboratory analysis of his urine shows the following concentrations: glucose 15 mmol L⁻¹, urea 12 mmol L⁻¹, sodium 140 mmol L⁻¹, potassium 4.5 mmol L⁻¹. Plasma osmolarity is 285 mOsm kg⁻¹, plasma sodium is 140 mmol L⁻¹ and plasma glucose concentration is 6 mmol L⁻¹. The glomerular filtration rate (GFR) is 120 mL min⁻¹.

Question Parts

( a )

Identify the most likely renal disorder responsible for the urine findings and justify your answer using the data provided.

( b )

Explain the normal role of the nephron segment(s) that reabsorb glucose, urea, sodium and potassium, and describe how dysfunction of these segments leads to the concentrations observed in the urine.

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About This Question

This is Waec Model Questions Vol1 2022 Biology Question 6. It is one of the essay questions from the 2022 Waec Model Questions Vol1 Biology examination.

The question covers Excretion .

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