The American journal of physiology
By Michael,Joel A ; Richardson,Daniel; Rovick, Allen
“Undergraduate Students’ Misconceptions About Respiratory Physiology”
Publisher: American Physiological Society
1999
Undergraduate Students’ Misconceptions About Respiratory Physiology
Type: Empirical
Data collection method: Test
Number of subjects, range: Large — 31 or more
Grade and age of subjects: Adult — over 18 years
- Atmospheric pressure is increased at high altitudes.
- Increases in minute ventilation are the result of increased breathing frequency, but tidal volume does not change or decrease.
- The partial pressure of O2 in the blood is determined by hemoglobin saturation.
- PaO2 and arterial oxygen content are equivalent.
- A change in inspired O2 must change alveolar CO2.
- The body can ‘‘run out’’ of oxygen.
- The respiratory system homeostatically regulates ventilation.
- Each breath is the result of a single action potential in the nerve to the respiratory muscle.
- Increases in the volume of O2 lead to increased ventilation because the body needs more oxygen.
- The lungs are expanded by increased pressure in the alveoli.