Respiration and Ventilation Quiz
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Questions and Answers

What is the formula for alveolar ventilation (VA)?

  • $VA = (VT - VD) \times frequency$ (correct)
  • $VA = VT - VD$
  • $VA = VT + VD$
  • $VA = \frac{VT}{VD} \times frequency$

    • What does the oxyhemoglobin dissociation curve shift to the left from?

  • Decrease in PO2
  • Increase in blood pH (correct)
  • Decrease in temperature
  • Increase in CO2

    • What is the function of central chemoreceptors in the body?

  • Detect pH (correct)
  • Decrease resistance in airways with exercise
  • Detect hypoxia and hypercapnia
  • Located in the brain

    • What is the normal blood pH at rest?

    <p>7.4</p> Signup and view all the answers

    What is the effect of CO2 on blood pH, which causes a decrease in the affinity of oxygen for hemoglobin?

    <p>Bohr effect</p> Signup and view all the answers

    What is the primary function of peripheral chemoreceptors in the body?

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

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

    <p>Difference in energy production/consumption</p> Signup and view all the answers

    What is the primary factor that increases hemoglobin's saturation with oxygen as it increases?

    <p>PO2</p> Signup and view all the answers

    What is the effect of training on capillarization?

    <p>Increases capillarization</p> Signup and view all the answers

    What is the formula for minute ventilation (VE)?

    <p>$VE = VT \times frequency$</p> Signup and view all the answers

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

    <p>Condition when O2 carried in arterial blood is severely reduced</p> Signup and view all the answers

    What are the adverse cardiovascular effects of diabetes?

    <p>Increases BP</p> Signup and view all the answers

    What are the direct benefits of physical activity?

    <p>Helps pulmonary system</p> Signup and view all the answers

    What are ergogenic aids?

    <p>Substances (or devices) that enhance energy production, use, or recovery and provide athletes with a competitive edge</p> Signup and view all the answers

    What is blood doping?

    <p>Increase # of RBCs to enhance oxygen capacity</p> Signup and view all the answers

    What is the atmospheric pressure at sea level?

    <p>760 mm Hg</p> Signup and view all the answers

    What happens to venous blood saturation as workload increases?

    <p>Decreases and plateaus around 80%</p> Signup and view all the answers

    What is the definition of ventilation?

    <p>Not a linear increase, with break points where it increases faster</p> Signup and view all the answers

    What is the definition of A-a (alveolar to arterial) PO2 difference?

    <p>Difference in PO2 between alveolar and arterial blood</p> Signup and view all the answers

    What is the definition of O2 extraction from blood?

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

    What is the formula for minute ventilation (VE)?

    <p>VE = frequency * tidal volume</p> Signup and view all the answers

    What is the definition of hyperpnea?

    <p>Increased depth and rate of breathing</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 Triphasic response in relation to ventilation?

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

    What does the term 'ventilatory drift' refer to?

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

    What is the physiological dead space primarily due to?

    <p>Non-perfused alveoli</p> Signup and view all the answers

    What is the main factor influencing minute ventilation (VE)?

    <p>Work rate</p> Signup and view all the answers

    What is the formula for physiological dead space (VD)?

    <p>1mL/body weight</p> Signup and view all the answers

    What is the percentage of oxygen in room air?

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

    What is the main function of tidal ventilation?

    <p>Initial increase in minute ventilation</p> Signup and view all the answers

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