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Breathing and Exchange of Gases Test - 3
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Breathing and Exchange of Gases Test - 3

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  • Question 1/10
    1 / -0

    Which of the following statements is/are false?

    a. When the pressure within the lungs is less than the atmospheric pressure, inspiration occurs.
    b. Both the lungs are covered by triple layer of pleura, having pleural fluid between them.
    c. Respiratory rhythm centre is responsible for maintaining and moderating the respiratory rhythm in humans.

    Solutions

    This is the correct option as this statement is false. Both the lungs are covered by double layer of pleura, having pleural fluid between them.
     

  • Question 2/10
    1 / -0

    The conducting part of the respiratory system is the part starting with the external nostrils up to the terminal bronchioles. Which of the following is not a function of the conducting part?

    Solutions

    This is the correct option as this is not a function of the conducting part. Alveoli and their ducts form the exchange part of the respiratory system.
     

  • Question 3/10
    1 / -0

    Among other organs, the thoracic chamber protects and holds the heart and lungs. Which of the following form(s) the thoracic chamber ventrally?

    Solutions

    This is the correct option as the thoracic chamber is formed ventrally by the sternum.

  • Question 4/10
    1 / -0

    Which of the following statements is/are false?

    a. The expansion of diaphragm decreases the volume of thoracic chamber in the antero-posterior axis.
    b. On an average, 1100 mL to 1200 mL volume of air remains in the lungs even after a forcible expiration.
    c. Humans can increase the strength of breathing with the help of additional muscles in the abdomen.

    Solutions

    This is the correct option as this statement is false. The contraction of diaphragm increases the volume of thoracic chamber in the antero-posterior axis.
     

  • Question 5/10
    1 / -0

    Which of the following statements is/are false?

    a. The device that can be used to estimate the volume of air involved in breathing movements is called barometer.
    b. Expiration occurs if the intra-pulmonary pressure is higher than the atmospheric pressure.
    c. The additional volume of air that a person can inspire by a forcible inspiration is called the inspiratory reserve volume.

    Solutions

    The device that can be used to estimate the volume of air involved in breathing movements is called spirometer.

  • Question 6/10
    1 / -0

    Match the following:

    a. Tidal volume 1. It is the additional volume of air that a person can expire by a forcible expiration.
    b. Expiratory reserve volume 2. It is the volume of air expired or inspired during a normal respiration.
    c. Residual volume 3. It is the volume of air remaining in the lungs even after forcible expiration.
    Solutions

    Tidal volume (symbol VT or TV) is the lung volume representing the normal volume of air displaced between normal inhalation and exhalation when extra effort is not applied. In a healthy, young human adult, tidal volume is approximately 500 mL per inspiration or 7 mL/kg of body mass.
    Expiratory reserve volume (EPV) is the amount of extra air (above normal (tidal) volume) that is exhaled during a forceful breath out.
    Residual volume is the amount of air that remains in a person's lungs after fully exhaling.

  • Question 7/10
    1 / -0

    Which of the following enzymes helps in transporting nearly 70 percent of carbon dioxide as bicarbonate?

    Solutions

    The enzyme carbonic anhydrase helps in transporting nearly 70 percent of carbon dioxide as bicarbonate.

  • Question 8/10
    1 / -0

    Which of the following can alter the respiratory mechanism?
    a. The pneumotaxic centre in the pons region of the brain
    b. The chemosensitive area in the medulla
    c. The respiratory centre in the medulla

    Solutions

    The pneumotaxic centre in the pons region of the brain and the chemosensitive area in the medulla can alter the respiratory mechanism.

  • Question 9/10
    1 / -0

    What percentage of oxygen is carried in a dissolved state through the plasma?

    Solutions

    It is the percentage of oxygen that is carried in a dissolved state through the plasma.

  • Question 10/10
    1 / -0

    Which of the following statements is/are false?
    a. Haemoglobin is present in the RBCs as a red-coloured iron-containing pigment.
    b. Oxygen plays quite a insignificant role in the regulation of respiratory rhythm.
    c. Vital capacity is the total volume of air accommodated in the lungs at the end of a forced inspiration.

    Solutions

    Total lung capacity is the total volume of air accommodated in the lungs at the end of a forced inspiration.

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