1014 Systems Coupling Summary
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Questions and Answers

Which of the following is a mechanism that increases oxygen uptake by muscles during exercise?

  • Decreased pulmonary blood flow
  • Decreased cardiac output
  • Constriction of selected peripheral vascular beds (correct)
  • Decreased extraction of O2 from blood perfusing the muscles

What is the relationship between pulmonary blood flow and oxygen uptake from the alveoli?

  • They are directly proportional (correct)
  • They are unrelated
  • They are inversely proportional
  • Pulmonary blood flow has no effect on oxygen uptake

What is the formula for minute CO2 output?

  • CO2 = E × PaCO2/PB
  • CO2 = A × PaCO2/PB (correct)
  • CO2 = E × PaO2/PB
  • CO2 = A × PaO2/PB

What is the formula for minute alveolar ventilation?

<p>A = E/VT (D)</p> Signup and view all the answers

What is the relationship between minute ventilation and CO2 output during moderate work intensities?

<p>They are directly proportional (C)</p> Signup and view all the answers

What is the effect of metabolic acidosis on ventilation during heavy and very heavy work intensities?

<p>Increases ventilation (C)</p> Signup and view all the answers

What is the formula for minute alveolar CO2 partial pressure?

<p>PaCO2 = E × CO2/PB (C)</p> Signup and view all the answers

What is the effect of heavy exercise on the increase in cardiac output?

<p>It is relatively small compared to the increase in metabolic rate (A)</p> Signup and view all the answers

What is the effect of increased extraction of O2 from the blood perfusing the muscles during exercise?

<p>Increased oxygen uptake by the muscles (A)</p> Signup and view all the answers

What is the effect of metabolic acidosis on ventilation during moderate work intensities?

<p>Has no effect on ventilation (D)</p> Signup and view all the answers

What is the effect of recruitment and vasodilation of pulmonary blood vessels during exercise?

<p>Increases pulmonary blood flow (B)</p> Signup and view all the answers

What is the effect of minute ventilation on CO2 output during exercise?

<p>Increases CO2 output (D)</p> Signup and view all the answers

Which of the following is a mechanism that increases oxygen uptake by muscles during exercise?

<p>Constriction of selected peripheral vascular beds (A)</p> Signup and view all the answers

What is the relationship between pulmonary blood flow and oxygen uptake from the alveoli?

<p>They are directly proportional (C)</p> Signup and view all the answers

What is the formula for minute CO2 output?

<p>CO2 = A × PaCO2/PB (A)</p> Signup and view all the answers

What is the formula for minute alveolar ventilation?

<p>A = E/VT (C)</p> Signup and view all the answers

What is the relationship between minute ventilation and CO2 output during moderate work intensities?

<p>They are directly proportional (D)</p> Signup and view all the answers

What is the effect of metabolic acidosis on ventilation during heavy and very heavy work intensities?

<p>Increases ventilation (B)</p> Signup and view all the answers

What is the formula for minute alveolar CO2 partial pressure?

<p>PaCO2 = E × CO2/PB (C)</p> Signup and view all the answers

What is the effect of heavy exercise on the increase in cardiac output?

<p>It is relatively small compared to the increase in metabolic rate (B)</p> Signup and view all the answers

What is the effect of increased extraction of O2 from the blood perfusing the muscles during exercise?

<p>Increased oxygen uptake by the muscles (B)</p> Signup and view all the answers

What is the effect of metabolic acidosis on ventilation during moderate work intensities?

<p>Has no effect on ventilation (A)</p> Signup and view all the answers

What is the effect of recruitment and vasodilation of pulmonary blood vessels during exercise?

<p>Increases pulmonary blood flow (C)</p> Signup and view all the answers

What is the effect of minute ventilation on CO2 output during exercise?

<p>Increases CO2 output (D)</p> Signup and view all the answers

Which of the following mechanisms contributes the most to the large increase in oxygen use by muscles during exercise?

<p>Increased extraction of O2 from the blood perfusing the muscles (D)</p> Signup and view all the answers

What is the relationship between oxygen uptake (O2) and pulmonary blood flow?

<p>O2 uptake is directly proportional to pulmonary blood flow (D)</p> Signup and view all the answers

What is the equation that relates CO2 output to alveolar ventilation, arterial or ideal alveolar CO2 partial pressure, and barometric pressure?

<p>CO2 = A × PaCO2/PB (B)</p> Signup and view all the answers

What is the relationship between minute ventilation (E) and the newly produced CO2 arriving at the lungs?

<p>E increases in relation to the newly produced CO2 (A)</p> Signup and view all the answers

What is the formula for minute ventilation (E)?

<p>E = VT × f (D)</p> Signup and view all the answers

What is the relationship between alveolar ventilation (A) and arterial or ideal alveolar CO2 partial pressure?

<p>A is inversely proportional to arterial or ideal alveolar CO2 partial pressure (A)</p> Signup and view all the answers

What is the term used to describe the increase in ventilation to provide respiratory compensation for metabolic acidosis?

<p>Respiratory alkalosis (B)</p> Signup and view all the answers

What is the term used to describe the increase in pulmonary blood flow by recruitment and vasodilation of pulmonary blood vessels during exercise?

<p>Pulmonary recruitment (D)</p> Signup and view all the answers

What is the term used to describe the amount of air that does not participate in gas exchange, but fills the airways?

<p>Dead space ventilation (C)</p> Signup and view all the answers

What is the term used to describe the increase in ventilation to provide respiratory compensation for metabolic alkalosis?

<p>Respiratory alkalosis (B)</p> Signup and view all the answers

What is the relationship between minute ventilation (E) and CO2 output?

<p>E is directly proportional to CO2 output (A)</p> Signup and view all the answers

What is the term used to describe the increase in cardiac output during exercise?

<p>Cardiac output reserve (D)</p> Signup and view all the answers

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