Respiratory System Volumes and Capacities
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Questions and Answers

What is the approximate tidal volume during normal breathing at rest?

  • $3500 cm^3$
  • $2000 cm^3$
  • $500 cm^3$ (correct)
  • $1000 cm^3$

What is the inspiratory reserve volume?

  • The maximum volume of air that can be inhaled after a normal tidal inspiration (correct)
  • The volume of air contained in the lungs after maximal inspiration
  • The maximum volume of air that can be exhaled after a normal tidal expiration
  • The volume of air remaining in the lungs after a maximal expiration

What is the functional residual capacity (FRC)?

  • The volume of air remaining in the lungs after a maximal expiration
  • The volume of air contained in the lungs after maximal inspiration
  • The volume of air remaining in the lungs after a normal expiration (correct)
  • The maximum volume of air that can be exhaled after a normal tidal expiration

What is the residual volume?

<p>The volume of air which remains in the lungs after a maximal expiration (A)</p> Signup and view all the answers

What is the total lung capacity (TLC)?

<p>The volume of air contained in the lungs after maximal inspiration (A)</p> Signup and view all the answers

What are anatomical and physiological dead spaces?

<p>The spaces in the respiratory system where air does not provide oxygen to the body (B)</p> Signup and view all the answers

What is the definition of anatomical dead space?

<p>The volume of air in the conducting airways where gas exchange does not occur (C)</p> Signup and view all the answers

What is the relationship between compliance and lung stiffness?

<p>A stiff lung has low compliance (C)</p> Signup and view all the answers

What is the range of compliance in normal adults?

<p>0.18-0.27 liter/cmH2O (C)</p> Signup and view all the answers

Which of the following situations would result in reduced lung compliance?

<p>Pulmonary fibrosis (A)</p> Signup and view all the answers

According to the Law of Laplace for a sphere, what is the relationship between the pressure difference across the alveolar wall and the alveolar radius?

<p>$\Delta P = 4\gamma / R$ (A)</p> Signup and view all the answers

What is the definition of compliance in the context of lung mechanics?

<p>The change in volume produced by a small change in pressure (D)</p> Signup and view all the answers

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