Podcast
Questions and Answers
During inspiration, the pressure within the lungs (intrapulmonary pressure) is _________ the air pressure outside the body.
During inspiration, the pressure within the lungs (intrapulmonary pressure) is _________ the air pressure outside the body.
- equal to
- unrelated to
- less than (correct)
- greater than
During expiration, the pressure in the lungs _________ and the volume in the thorax _________.
During expiration, the pressure in the lungs _________ and the volume in the thorax _________.
- increases, decreases (correct)
- increases, increases
- decreases, increases
- decreases, decreases
The pressure changes required for adequate ventilation at rest are _________.
The pressure changes required for adequate ventilation at rest are _________.
- variable
- quite large
- small (correct)
- moderate
Which of the following is NOT one of the four components of respiration?
Which of the following is NOT one of the four components of respiration?
Which of the following is an advantage of nasal breathing?
Which of the following is an advantage of nasal breathing?
Where does gas exchange occur in the lungs?
Where does gas exchange occur in the lungs?
What does the arterial–mixed venous oxygen difference across muscle describe?
What does the arterial–mixed venous oxygen difference across muscle describe?
What does the oxyhemoglobin dissociation curve describe?
What does the oxyhemoglobin dissociation curve describe?
Which of the following is the correct equation for pressure in the pulmonary circulation?
Which of the following is the correct equation for pressure in the pulmonary circulation?
Which of the following is true about the respiratory membrane?
Which of the following is true about the respiratory membrane?
According to Henry's law, gases dissolve in liquids in proportion to their _________.
According to Henry's law, gases dissolve in liquids in proportion to their _________.
Which gas has a much lower diffusion constant than oxygen?
Which gas has a much lower diffusion constant than oxygen?
What is the pressure gradient for oxygen across the respiratory membrane?
What is the pressure gradient for oxygen across the respiratory membrane?
What is the oxygen diffusion capacity expressed as?
What is the oxygen diffusion capacity expressed as?
Which of the following is NOT a function of pulmonary diffusion?
Which of the following is NOT a function of pulmonary diffusion?
What is the maximum amount of air that can be expired after a maximal inspiration called?
What is the maximum amount of air that can be expired after a maximal inspiration called?
What is the main function of the respiratory pump?
What is the main function of the respiratory pump?
Which of the following is true about the oxygen diffusion capacity during maximal exercise?
Which of the following is true about the oxygen diffusion capacity during maximal exercise?
What is the gradient between the mean partial pressure of the pulmonary capillary and the alveolar air?
What is the gradient between the mean partial pressure of the pulmonary capillary and the alveolar air?
What is the approximate diffusion of oxygen per minute through the respiratory membrane?
What is the approximate diffusion of oxygen per minute through the respiratory membrane?
What is the primary cause of the increase in oxygen diffusion capacity from rest to exercise?
What is the primary cause of the increase in oxygen diffusion capacity from rest to exercise?
What is the approximate PCO2 of the blood passing from the right side of the heart through the alveoli?
What is the approximate PCO2 of the blood passing from the right side of the heart through the alveoli?
What is the approximate PCO2 of the air in the alveoli?
What is the approximate PCO2 of the air in the alveoli?
What is the pressure gradient for carbon dioxide exchange?
What is the pressure gradient for carbon dioxide exchange?
