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IB Biology HL D3.3.9 Hl Loop of Henle Questions

Analyse how salt pumping by the water-impermeable ascending limb and water loss from the descending limb create the medullary gradient for concentrated urine.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Explain why the ascending limb pumps Na⁺/Cl⁻, is impermeable to water and builds the medullary osmotic gradient.
  • Relate water loss from the descending limb and a long loop of Henle to concentrated urine and water conservation in mammals.

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Study D3.3.9 (HL)—Loop of Henle conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology HL D3.3.9 Hl Loop of Henle Questions question 1

[Maximum number: 1]

What is the function of the loop of Henle?

A

To reabsorb salt

B

To maintain a hypertonic solution in the medulla

C

To transport liquid from the collecting ducts to the convoluted tubules

D

To reabsorb glucose

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