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Edexcel A-Level Biology A2 7.20 Selective Reabsorption and Loop of Henle Questions

Explain sodium–glucose co-transport, trace ion and water movement through the loop of Henle, and link long loops and medullary gradients to concentrated urine.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
A2

Exam points

  • explain sodium co-transport and selective glucose reabsorption in the proximal tubule
  • trace ion and water movement through descending and ascending limbs of the loop
  • link a long loop of Henle to a steep gradient and concentrated urine in dry habitats

Edexcel A-Level Biology A2 7.20 Selective Reabsorption and Loop of Henle Questions question 1

[Maximum number: 3]

The kidney is involved in the process of homeostasis in a mammal.

The table shows the concentration of glucose and urea in the blood plasma, glomerular filtrate and urine of an individual.

Table for Question Edexcel A-Level Biology A2 7.20 Selective Reabsorption and Loop of Henle Questions question 1 — Edexcel A-Level Biology A2

Explain the concentration of glucose and urea in the urine.
Use the information in the table to support your answer.

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