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DP IB Biology: HL

Topic Questions

Home / IB / Biology: HL / DP / Topic Questions / 6. Human Physiology / 6.4 Gas Exchange / Multiple Choice: Paper 1


6.4 Gas Exchange

Question 1

Marks: 1

During a gas exchange investigation, measurements were recorded from four animals that were observed as they breathed normally over a period of 5 minutes. Note that the efficiency of gas exchange was the same in all four animals and that tidal volume refers to the volume of air that moves into the lungs with each normal breath.

Which animal had the highest oxygen intake during five minutes of normal breathing?

Animal Tidal volume / dm3 Breathing rate / breaths per minute
A. 0.2 10
B. 0.6 20
C. 0.5 18
D. 0.33 24
    Choose your answer
      
    Key Concepts
    Ventilation

    Question 2

    Marks: 1

    Which row of the table contains five correct statements about forced expiration?

      Ribs Diaphragm Pressure in thorax External intercostal muscles Internal intercostal muscles
    A. Move down and inwards Contracts Increases Relax Relax
    B. Move down and inwards Relaxes Increases Relax Contract
    C. Move down and inwards Relaxes Decreases Recoil Contract
    D. Move up and outwards Contracts Decreases Contract Contract 
      Choose your answer
        

      Question 3

      Marks: 1

      Four patients, all male and in the age range 60-65, visited their family doctor complaining of breathing difficulties. The doctor asked each man a series of questions about his symptoms and lifestyle. 

      Based upon the men's lifestyles and their lists of symptoms, which patient is at the highest risk of lung cancer?

      Patient Smoker / how many cigarettes? Coughing? Fatigue? Appetite? Other
      A. Yes - 20 per day since age 18 Yes - sometimes with blood Every day Poor Worked with asbestos in his 20s
      B. Yes - 5 per day since age 18 Yes - frequent No High BMI = 39
      C. No Yes - especially at night Occasionally Normal Dry, flaky skin
      D. 40 years at 20 per day but quit smoking completely 5 years ago Yes - persistent colds and coughs Occasionally Poor Chest pains
        Choose your answer
          
        Key Concepts
        Cancer
        Smoking & Cancer

        Question 4

        Marks: 1

        Anti-smoking groups have conducted a long-running campaign to link smoking to lung cancer in a causal relationship. This relationship was finally proved in the British Doctors Study that ran from 1951-2001.

        Which is not a factor that contributed to this causal link being proven?

        • High response rates from patients were seen in the study.

        • Epidemiological data was gathered over a long period of time.

        • Many confounding variables were taken into account and then eliminated. 

        • Many experiments were carried out to increase the experimental data available.

        Choose your answer
          
        Key Concepts
        Cancer
        Smoking & Cancer

        Question 5

        Marks: 1

        Some of the effects of smoking are given below. 

        1. Alveolar walls become less elastic.
        2. Increased nerve impulse transmission occurs in parts of the brain.
        3. Heart rate increases.
        4. The risk of changes to genes involved in controlling the cell cycle increases.

        Which row of the table contains the smoking-related causes of effects 1-4? Note that 'tar' in this context is a term used for the combination of insoluble and viscous chemicals found in tobacco smoke. 

          1. 2. 3. 4.
        A. Increased activity of phagocytes Increased activity of phagocytes Nicotine in tobacco binds to acetylcholine receptors Stimulation of the glands that secrete epinephrine/adrenaline
        B. Stimulation of the glands that secrete epinephrine/adrenaline Inhalation of tar Stimulation of the glands that secrete epinephrine/adrenaline Increased activity of phagocytes
        C. Increased activity of phagocytes Nicotine in tobacco binds to acetylcholine receptors Stimulation of the glands that secrete epinephrine/adrenaline Inhalation of tar
        D. Inhalation of tar Inhalation of tar Nicotine in tobacco binds to acetylcholine receptors Stimulation of the glands that secrete epinephrine/adrenaline
          Choose your answer
            
          Key Concepts
          Cancer
          Emphysema