Gce Model Questions Vol1 2024 Biology Question 6

Practice essay / theory question 6 from the 2024 Gce Model Questions Vol1 Biology examination. This question covers Excretion .

Gce Model Questions Vol1 2024 Biology Essay / Theory

Topic: Excretion

Question 6 GCE_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • essay

A 28‑year‑old adult is undergoing routine renal function testing. The following pressures are measured in the glomerular capillaries and Bowman's capsule: - Glomerular hydrostatic pressure (Pgc) = 55 mmHg - Bowman's capsule hydrostatic pressure (Pbc) = 15 mmHg - Plasma oncotic pressure (πgc) = 30 mmHg The filtration coefficient (Kf) for the kidneys is 12.5 mL min⁻¹ mmHg⁻¹. Answer the following questions:

Question Parts

( a )

Calculate the net filtration pressure and the glomerular filtration rate (GFR) for this individual.

( b )

If the plasma protein concentration rises, increasing the oncotic pressure to 35 mmHg while the other pressures remain unchanged, determine the new GFR and comment on the physiological significance of this change.

( c )

A drug that specifically inhibits the Na⁺/K⁺‑ATPase in the renal tubular epithelial cells is administered. Discuss how this inhibition would affect urine volume, urine concentration and the composition of the urine.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Gce Model Questions Vol1 2024 Biology Question 6. It is one of the essay questions from the 2024 Gce Model Questions Vol1 Biology examination.

The question covers Excretion .

View More Gce Model Questions Vol1 2024 Biology Questions More Gce Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support