Physiology of Respiration
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Questions and Answers

What is the primary function of external respiration?

  • Regulation of respiration
  • Exchange of O2 and CO2 between cells and capillary blood
  • Uptake of O2 and excretion of CO2 in the lungs (correct)
  • Transport of O2 and CO2 in the blood

    • What is the total surface area of the alveoli?

  • 50 m2
  • 30 m2
  • 100 m2
  • 70 m2 (correct)

    • What is the function of type II pneumocytes in the alveoli?

  • Production of surfactant (correct)
  • Immune response
  • Blood perfusion
  • Gas exchange

    • What is the name of the process by which air enters and leaves the lungs?

    <p>Pulmonary ventilation</p> Signup and view all the answers

    What is the name of the part of the respiratory tract that includes the trachea and bronchi?

    <p>Lower airways</p> Signup and view all the answers

    What is one of the nonrespiratory functions of the respiratory system?

    <p>Voice production</p> Signup and view all the answers

    What percentage of the tidal volume is accounted for by the diaphragm?

    <p>60-75%</p> Signup and view all the answers

    What is the term for breathing at a higher frequency?

    <p>Tachypnea</p> Signup and view all the answers

    Which muscle is NOT an auxiliary-accessory-inspiratory muscle?

    <p>Diaphragm</p> Signup and view all the answers

    What is the term for the sensation of breathlessness in the recumbent position?

    <p>Orthopnea</p> Signup and view all the answers

    What is the term for normal quiet breathing?

    <p>Eupnoea</p> Signup and view all the answers

    What is the term for the space in the airways where there is no exchange of oxygen and carbon dioxide between the air and pulmonary capillary blood?

    <p>Dead space</p> Signup and view all the answers

    What is the primary difference between anatomic dead space and total dead space in healthy individuals?

    <p>There is no difference between the two</p> Signup and view all the answers

    What is the normal value of anatomic dead space in healthy individuals?

    <p>150 ml</p> Signup and view all the answers

    How can anatomic dead space be measured?

    <p>By analyzing single-breath N2 curves</p> Signup and view all the answers

    What is the formula used to calculate total dead space?

    <p>PECO2 x VT = PACO2 x (VT - VD)</p> Signup and view all the answers

    What is the value of VD in the given example?

    <p>150 ml</p> Signup and view all the answers

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