Gce Model Questions Vol1 2017 Biology Question 6

Practice essay / theory question 6 from the 2017 Gce Model Questions Vol1 Biology examination. This question covers excretion, urinary system, kidney .

Gce Model Questions Vol1 2017 Biology Essay / Theory
Topics: excretion urinary system kidney
Question 6 GCE_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • essay
Gce Model Questions Vol1 2017 Biology Question 6 diagram

The diagram (labelled A–M) shows the main structures of the human excretory system. Using the diagram, answer the following:

Question Parts

( a )
Describe, in order, the pathway that urine follows from its formation in the blood to its elimination from the body, naming each labelled structure and stating its principal function in the process.
( b )
Explain the mechanism of ultrafiltration that occurs in the glomerulus (label F). In your answer, identify the three principal forces that determine the net filtration pressure and indicate whether each force promotes or opposes filtration.
( c )
Discuss how the counter‑current multiplier system in the loop of Henle (label H) contributes to the concentration of urine. Include in your answer the role of the descending and ascending limbs and explain how antidiuretic hormone (ADH) modifies this system.
( d )
Compare the excretory adaptations of a desert‑dwelling mammal (e.g., the kangaroo rat) with those of the human kidney. Focus on structural and functional differences that enable the desert mammal to conserve water.

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 2017 Biology Question 6. It is one of the essay questions from the 2017 Gce Model Questions Vol1 Biology examination.

The question covers excretion, urinary system, kidney .

View More Gce Model Questions Vol1 2017 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