Excretion

Excretion Quiz

Spec 2.70–79B · Edexcel IGCSE Biology: Quiz

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5 questions, one answer each

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  1. 1. Which organ excretes urea, excess water and excess ions?

    • A. Lungs
    • B. Skin
    • C. Kidneys
    • D. Liver

  2. 2. Where does ultrafiltration occur?

    • A. The collecting duct
    • B. The Bowman's capsule and glomerulus
    • C. The bladder
    • D. The loop of Henle

  3. 3. Why is glucose usually completely absent from urine in a healthy person?

    • A. Glucose molecules are too large to be filtered out of the blood
    • B. Glucose is completely reabsorbed at the proximal convoluted tubule
    • C. The kidneys destroy glucose during filtration
    • D. Glucose evaporates before reaching the bladder

  4. 4. A person is dehydrated. What effect would this have on ADH release and urine produced?

    • A. Less ADH released, large volume of dilute urine
    • B. More ADH released, small volume of concentrated urine
    • C. No change in ADH or urine
    • D. More ADH released, large volume of dilute urine

  5. 5. Which of these correctly distinguishes excretion from egestion?

    • A. Excretion removes undigested food; egestion removes metabolic waste
    • B. Excretion removes metabolic waste products; egestion removes undigested food as faeces
    • C. They are the same process with different names
    • D. Excretion only happens in plants; egestion only in animals

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