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IGCSEBiology: Co-ordinated Sciences (Double Award)CIEExam Questions13. Coordination & ResponseCoordination, Response & Homeostasis

Coordination, Response & Homeostasis (CIE IGCSE Biology: Co-ordinated Sciences (Double Award))

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Coordination, Response & Homeostasis

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Coordination, Response & Homeostasis

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1
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Which of the following statements is a correct reason that humans sweat?

  • To lose water through the surface of the skin.

  • To increase water loss from the kidneys.

  • To increase heat loss from the body.

  • To reduce blood glucose levels.

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2
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Which of the following statements would not be a correct example of negative feedback?

  • An increase in core body temperature when cold.

  • Vasoconstriction.

  • The release of a neurotransmitter at a synapse.

  • The control of blood glucose levels.

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3
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Which row of the table best summarises the parts of the nervous system?

  brain neurones spinal cord
A central peripheral central
B peripheral peripheral central
C central central central
D peripheral central peripheral

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    4
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    Which of the following statements are reasons for the evolution of reflex arcs in the mammalian nervous system?

    1. To prevent harm or damage to an organism.
    2. To provide a rapid response to dangerous situations.
    3. To allow a degree of choice to an organism about response.
    4. To allow certain stimuli to be ignored/eliminated.

    • 1 and 3 only

    • 1 and 2 only

    • 1, 2 and 3

    • 2, 3 and 4

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    5
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    Which row of the table best describes receptor organs and their respective stimuli in the human body?

      Skin Ears Nose
    A pressure sound chemical (in solution)
    B heat balance chemical (in solution)
    C pressure balance chemical (vapours)
    D heat sound temperature

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      1
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      The image below shows a simple reflex arc. 

      14--image-1---reflex-1

      Which of the following sequences correctly shows the order of cells that an impulse passes through during a reflex action? 

       

      first  →  last

      A

      Z   →    X   →    Y 

      B

      X   →   Y    →   Z

      C

      Y  →     X   →    Z

      D

      Z   →    Y   →    X

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        2
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        Extended Tier Only

        Which row of the following table correctly describes what happens in the body after a person consumes a can of sugary drink?

         

        role of the pancreas

        role of the liver

        effect

        A

        releases glucagon

        converts glycogen into glucose

        blood sugar levels rise

        B

        releases insulin

        converts excess glucose into glycogen

        blood sugar level falls

        C

        releases glucagon

        converts excess glucose into glycogen

        blood sugar level falls

        D

        releases insulin

        converts glycogen into glucose

        blood sugar levels rise

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          3
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          The image below shows a cell from the nervous system. The cell forms part of a reflex arc.

          14--image-3--neurone

          An impulse moves along the neurone from Q to P. 

          What structures would be found at P and Q?

           

          P

          Q

          A

          receptor

          relay neurone

          B

          relay neurone

          receptor

          C

          motor neurone 

          relay neurone

          D

          gland

          relay neurone

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            4
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            Extended Tier Only

            An athlete takes part in a marathon. 

            What would be the effect of an athlete taking part in a marathon race on a hot, sunny day? 

             

            volume of water reabsorbed in the kidneys

            volume of water lost from the skin

            effect on hairs on the skin

            A

            less

            decreases

            lie flat

            B

            more

            decreases

            erect

            C

            less

            increases

            lie flat

            D

            more

            increases

            lie flat 

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              5
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              The image below shows the structures involved in a simple reflex arc. 

              14--image-4--reflex-2

              Which of the following sequences correctly shows the order that an impulse passes through during a reflex action? 

              • S → U → V → T

              • S → T → U → V

              • S → V → U → T

              • T → V → U → S

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              1
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              Extended Tier Only

              Which of the following statements about glucagon are false?

              1. Glucagon reverses the effect of the hormone glycogen
              2. Glucagon is produced in the pancreas
              3. Glucagon is secreted when blood glucose levels fall
              4. Glucagon stimulates liver and muscle cells to convert glucose into stored glycogen
              5. Glucagon is a polysaccharide
              6. Glucagon is usually secreted soon after ingestion of carbohydrate-rich food

              • 1, 2, 5 and 6

              • 1, 3, 4 and 6

              • 1, 4, 5 and 6

              • 5 and 6 only

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