Ventilation and Respiration Quiz
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Questions and Answers

What is the definition of exercise-induced arterial hypoxemia (EIAH)?

  • Condition when O2 carried in arterial blood is severely reduced (correct)
  • Condition when CO2 carried in arterial blood is severely reduced
  • Condition when CO2 carried in venous blood is severely reduced
  • Condition when O2 carried in venous blood is severely reduced

    • What happens to the A-a (alveolar to arterial) PO2 difference during incremental exercise?

  • It increases (correct)
  • It stays constant
  • It decreases
  • It fluctuates

    • What happens to the venous blood saturation as workload increases during incremental exercise?

  • It decreases and plateaus around 80% (correct)
  • It decreases and plateaus around 50%
  • It increases and plateaus around 80%
  • It increases and plateaus around 50%

    • What is the effect of higher intensity exercise on arterial CO2 levels?

    <p>Arterial CO2 levels drop off</p> Signup and view all the answers

    What is the impact of tidal volume increase on the VD/VT ratio?

    <p>More air going to alveoli, causing VD/VT ratio to increase</p> Signup and view all the answers

    What happens to the O2 extraction from blood as workload increases?

    <p>It plateaus around 50% max work rate</p> Signup and view all the answers

    What happens to the oxygen levels in muscle around 50% O2 extraction from blood?

    <p>Oxygen levels plateau</p> Signup and view all the answers

    What is the effect of body pumping more blood to muscle during exercise?

    <p>More O2 is delivered to the muscle</p> Signup and view all the answers

    What is the impact of altitude on atmospheric pressure?

    <p>Pressure is lower at altitude</p> Signup and view all the answers

    What happens to the O2 levels in arterial and alveolar PO2 at maximal exercise compared to at rest?

    <p>They are higher at maximal exercise</p> Signup and view all the answers

    What is the definition of ventilation?

    <p>Exchange of air</p> Signup and view all the answers

    What is the triphasic response related to ventilation?

    <p>3 phases of response</p> Signup and view all the answers

    What does the VD/VT ratio measure?

    <p>Measure of gas exchange efficiency</p> Signup and view all the answers

    What is the physiological dead space related to ventilation?

    <p>Volume of air that does not participate in gas exchange</p> Signup and view all the answers

    What is hyperpnea in the context of ventilation?

    <p>Increased depth and rate of breathing</p> Signup and view all the answers

    What is the minute ventilation (VE) in ventilation physiology?

    <p>Frequency multiplied by tidal volume</p> Signup and view all the answers

    What is the primary reason for not taking a big breath every time during exercise?

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

    What is the function of 'ventilatory drift' in ventilation physiology?

    <p>Rise in ventilation after a period of exercise</p> Signup and view all the answers

    What is the typical oxygen concentration in room air?

    <p>21%</p> Signup and view all the answers

    What does the anatomical dead space in ventilation physiology refer to?

    <p>1mL/body weight (~150 mL for average person)</p> Signup and view all the answers

    What is the formula for alveolar ventilation?

    <p>VA = (VT - VD) * frequency</p> Signup and view all the answers

    What does the SaO2% measure?

    <p>Percentage saturation of oxygen in blood</p> Signup and view all the answers

    What causes the oxyhemoglobin dissociation curve to shift to the right?

    <p>Increase in CO2</p> Signup and view all the answers

    What is the function of the Haldane effect?

    <p>Binding of O2 at lungs kicks off CO2 from hemoglobin</p> Signup and view all the answers

    What is the primary function of the peripheral chemoreceptors?

    <p>Detect hypoxia and hypercapnia</p> Signup and view all the answers

    What is the Bohr effect related to?

    <p>Effect of CO2 on blood pH and oxygen-hemoglobin affinity</p> Signup and view all the answers

    What does the a-vO2 (arterial venous oxygen) difference measure?

    <p>Difference in oxygen extraction by muscles</p> Signup and view all the answers

    What is the primary source of H+ for the bicarbonate buffering system?

    <p>Lactic acid</p> Signup and view all the answers

    What is the main function of hyperpnea?

    <p>Hyperventilation during heavy exercise</p> Signup and view all the answers

    What is the effect of training on capillarization?

    <p>Increases capillary amount</p> Signup and view all the answers

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