The kidney and osmoregulation

The kidney and osmoregulation Quiz

Spec 9.9 · Edexcel A-Level Biology B: Quiz

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5 questions, one answer each

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  1. 1. Which structure acts as the main filter that holds back plasma proteins?

    • A. Capillary endothelium
    • B. Basement membrane
    • C. Proximal tubule wall
    • D. Collecting duct wall

  2. 2. Which statement about the ascending limb of the loop of Henle is correct?

    • A. It is permeable to water and passively absorbs sodium
    • B. It is where ultrafiltration occurs
    • C. It releases ADH
    • D. It actively pumps out ions and is impermeable to water

  3. 3. A person drinks a large volume of water. What happens to ADH release and urine?

    • A. Less ADH, large volume of dilute urine
    • B. More ADH, small volume of concentrated urine
    • C. More ADH, large volume of dilute urine
    • D. Less ADH, small volume of concentrated urine

  4. 4. Why does a kangaroo rat produce very concentrated urine?

    • A. Its glomeruli are larger
    • B. It produces much more ADH than any other mammal
    • C. Its long loops of Henle create a very low water potential in the medulla
    • D. It has no collecting ducts

  5. 5. Which is true of the PCT?

    • A. Glucose is reabsorbed by co-transport with sodium ions
    • B. Glucose is reabsorbed by osmosis
    • C. Urea is made there
    • D. Protein is actively secreted into the filtrate

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