Life Science 6

23 Questions | Total Attempts: 40

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Life Science Quizzes & Trivia

Respiratory system


Questions and Answers
  • 1. 
    Which of the following best describes the main function of the human respiratory system?
    • A. 

      to enable oxygen to move from blood to air and carbon dioxide to move from air to blood;

    • B. 

      To enable oxygen to move from blood to air and carbon monoxide to move from air to blood;

    • C. 

      to enable oxygen to move from air to blood and carbon monoxide to move from blood to air;

    • D. 

      to enable oxygen to move from air to blood and carbon dioxide to move from blood to air

  • 2. 
    Which one of the following is NOT an accessory function of the human respiratory system?
    • A. 

      Losing body heat;

    • B. 

      Filtering materials from the circulation;

    • C. 

      Transport of gases to tissues

    • D. 

      Metabolism of some compounds;

  • 3. 
    Which one of the following is NOT a component of the lower part of the respiratory tract?
    • A. 

      Trachea;

    • B. 

      Bronchi

    • C. 

      Lungs

    • D. 

      pharynx

  • 4. 
     Which of the following is NOT a function of the nose?
    • A. 

      Detection of smells;

    • B. 

      Humidifying of inspired air;

    • C. 

      Gas exchange

    • D. 

      filtering of inspired air

  • 5. 
    Which of the following best describes the order of components of the airway after the trachea?
    • A. 

      Bronchi, bronchioles, alveolar ducts, alveoli;

    • B. 

      Bronchi, alveoli, bronchioles, alveolar ducts

    • C. 

      Alveolar ducts, bronchioles, bronchi, alveoli

    • D. 

      Bronchioles, alveolar ducts, alveoli, bronchi

  • 6. 
    Which of the following are the smallest and most numerous of the components of the airway?
    • A. 

      Bronchi;

    • B. 

      Alveoli;

    • C. 

      alveolar ducts

    • D. 

      Bronchioles

  • 7. 
    Which of the following has the greater volume?
    • A. 

      Conducting portion of respiratory tract;

    • B. 

      Respiratory portion of respiratory tract

  • 8. 
     Which of the following is/are a portion of the respiratory zone of the respiratory tract?
    • A. 

      Bronchi

    • B. 

      Alveoli

    • C. 

      Trachea

    • D. 

      Larynx

  • 9. 
    Which of the following is/are  a portion of the conducting zone of the respiratory tract?
    • A. 

      Alveolar ducts

    • B. 

      Alveoli

    • C. 

      Trachea

    • D. 

      Respiratory bronchioles

  • 10. 
    Which one of the following is NOT true concerning the structure of the pleura?
    • A. 

      the pleural membrane covers both the inside of the chest wall and the outside of the lung on each side of the chest;

    • B. 

      Each pleural membrane is several cells in thickness;

    • C. 

      Each pleural membrane is an epithelial tissue

    • D. 

      The pleural cavity contains a small amount of serous (watery) fluid.

  • 11. 
    Gas exchange in the body always involves
    • A. 

      Cellular respiration;

    • B. 

      breathing movements

    • C. 

      diffusion across membranes

    • D. 

      Active transport of gases

  • 12. 
    Which of the following best describes the process known as ventilation?
    • A. 

      the process of moving air into and out of the lungs;

    • B. 

      The process of gas exchange between blood and air;

    • C. 

      The process of moving air into and out of the upper part of the respiratory tract;

    • D. 

      The process of gas exchange between blood in the systemic capillaries and tissue fluid.

  • 13. 
    Which one of the following statements is true concerning the diaphragm?
    • A. 

      it separates the abdominal and pelvic cavities;

    • B. 

      It has both fibrous and muscular parts;

    • C. 

      It is not involved in forced expiration

    • D. 

      It is a perfectly flat structure

  • 14. 
    Which of the following best describes the process known as external respiration?
    • A. 

      the process of moving air into and out of the lungs;

    • B. 

      He process of gas exchange between blood and air;

    • C. 

      The process of moving air into and out of the upper part of the respiratory tract;

    • D. 

      The process of gas exchange between blood in the systemic capillaries and tissue fluid.

  • 15. 
    Which of the following best describes the process known as internal respiration?
    • A. 

      The process of moving air into and out of the lungs

    • B. 

      The process of gas exchange between blood and air;

    • C. 

      the process of moving air into and out of the lower part of the respiratory tract;

    • D. 

      the process of gas exchange between blood in the systemic capillaries and tissue fluid

  • 16. 
    The lower side of the lung cavity is formed by
    • A. 

      Diaphragm

    • B. 

      Oesophagus

    • C. 

      Stomach

    • D. 

      Rib

  • 17. 
    Which one of the following is NOT true regarding expiration?
    • A. 

      It is normally an active process;

    • B. 

      At rest, it typically relies only on the elastic recoil of the lungs;

    • C. 

      In forced expiration, the internal intercostal muscles may be used;

    • D. 

      it aims to generate a pressure gradient to the external atmosphere from the interior of the chest cavity;

  • 18. 
    Which one of the following processes causes the movement of gases between air and blood?
    • A. 

      Osmosis;

    • B. 

      Phagocytosis

    • C. 

      Diffusion

    • D. 

      Active transport

  • 19. 
    To which circulation do the capillaries involved in gas exchange in the lung belong?
    • A. 

      Systemic

    • B. 

      Portal

    • C. 

      Peri-tubular

    • D. 

      Pulmonary

  • 20. 
    Which component of the airway is most important in gas exchange in the lung?
    • A. 

      Bronchus

    • B. 

      Trachea

    • C. 

      Alveolus;

    • D. 

      Bronchiole

  • 21. 
    Which one of the following structures is NOT part of the barrier that gases have to cross in moving between blood and air?
    • A. 

      Lining of capillary blood vessel

    • B. 

      a basement membrane

    • C. 

      cartilage

    • D. 

      Interstitial fluid

  • 22. 
     What is the approximate total area of the surface avaialble for gas exchange (considering both lungs together)?
    • A. 

      50 -100 sq m

    • B. 

      5 - 10 sq m;

    • C. 

      5 - 50 sq m

    • D. 

      50 - 200 sq m

  • 23. 
    What part of the blood is most efficient at carrying oxygen
    • A. 

      Blood plasma solution

    • B. 

      Blood plasma proteins

    • C. 

      blood platelets

    • D. 

      Haemoglobin molecules of red blood cells