O LevelBiologyCambridgeExam Questions13. Excretion in Humans13.2 Urinary System

Urinary System (Cambridge O Level Biology)

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13.2 Urinary System

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13.2 Urinary System

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1
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Which of the following is not a main function of the kidneys in a healthy person?

  • To reabsorb all glucose.

  • To regulate blood pressure.

  • To breakdown toxins.

  • To eliminate excess sodium and potassium ions.

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2
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The image below shows the structure of the human urinary system.

13--image-2---the-urinary-system13--image-2---the-urinary-system

Which row of the table below correctly matches the structures in the image to their names?

  renal artery urethra ureter
A W Z X
B W Z Y
C X Y Z
D X W Y

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    3
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    Which of the following would not be a function of the liver?

    • Assimilation of amino acids

    • Breakdown of alcohol

    • Deamination

    • Excretion of urea

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    41 mark

    Which row matches the parts of the urinary system to their functions?

      makes urine carries urine holds urine removes urine
    from body
    A bladder ureter urethra kidney
    B bladder urethra ureter kidney
    C kidney ureter bladder urethra
    D kidney urethra bladder ureter

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      1
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      Each kidney contains one million kidney tubules called nephrons. A nephron is shown in the image below.

      13--image-1---nephron

      Which row of the table below correctly shows where filtration and selective reabsorption occur?

        filtration selective reabsorption
      A 1 2
      B 2 4
      C 2 3
      D 1 3

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        2
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        Which of the following substances would be reabsorbed by the kidneys?

        • Salts, urea and glycogen

        • Salts and glycogen

        • Salts and glucose

        • Urea and glucose

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        3
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        Which of the following statements correctly describes the function of the kidneys?

        • Reabsorbing glucose and removing urea.

        • Removing glucose and reabsorbing salts.

        • Deamination and reabsorption of glucose.

        • Making and removing urea.

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        41 mark

        The diagram shows structures in a human that form and store urine. Liquids pass through tubes X, Y and Z in the directions shown by the arrows. q4-13-2-the-urinary-system-medium-mcq-cie-o-level-biology

        Which statement about the volume of liquid passing through Y in one day is correct? 

        • It is greater than that passing through X.

        • It is less than that passing through Z.

        • It is much less than that passing through X but slightly greater than that passing through Z.

        • It is slightly less than that passing through X but much greater than that passing through Z.

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        1
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        The following table shows the composition of blood entering the kidneys of a healthy person.

        substance % composition of blood entering the kidney
        glucose 0.20
        urea 0.01
        protein 7.00

        Which row of the table below would show the percentage composition of blood of the same substances in the urine of a healthy person?

          composition of urine / %
          glucose urea protein
        A 0.00 2.50 0.00
        B 0.00 2.50 3.50
        C 2.00 0.00 7.00
        D 0.20 0.01 0.00

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          2
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          Which of the following factors would affect the volume and concentration of urine produced by the kidneys?

          1. Exercise
          2. Temperature
          3. Water intake

          • 1 and 3 only

          • 2 and 3 only

          • 3 only

          • All 3 of the above

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          3
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          The table below shows the composition of a solution found in the human body.

          component concentration / arbitrary units
          glucose 0.00
          urea 4.00
          protein 0.00
          salts 3.00
          amino acids 0.00

          In a healthy person, which of the following structures would contain this solution?

          13--image-3---kidneys

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            4
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            The image below shows a number of organs involved in helping rid the body of waste products.

            GePLcbG-_picture1

            Excess amino acids from the diet cannot be stored by the body. One of the products of their breakdown is urea. 

            Which row of the table below is correct?

              name for breakdown of excess amino acids makes urea removes urea from the blood
            A assimilation Y Z
            B deamination X Y
            C assimilation Y X
            D deamination X Z

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              51 mark

              The diagram represents the blood supply to the liver and the kidneys.q4-13-2--urinary-system-medium-mcq-cie-o-level-biology 

              Which vessels contain blood with the highest and lowest concentrations of urea? 

                highest lowest
              A 1 2
              B 1 4
              C 3 2
              D 3 4

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