Podcast
Questions and Answers
According to Fick’s Law, the rate of transfer through a sheet of tissue is proportional to which of the following?
According to Fick’s Law, the rate of transfer through a sheet of tissue is proportional to which of the following?
- Difference in partial pressure of gas and tissue thickness
- Tissue area and the difference in partial pressure of gas (correct)
- Tissue area and the diffusion coefficient
- Tissue thickness and the diffusion coefficient
Which gas has the highest diffusion coefficient?
Which gas has the highest diffusion coefficient?
- Helium (correct)
- Carbon dioxide
- Carbon monoxide
- Oxygen
What is the primary driving force for net diffusion of molecules?
What is the primary driving force for net diffusion of molecules?
- Pressure difference (correct)
- Kinetic energy
- Temperature
- Molecular weight
What does the diffusion coefficient depend on?
What does the diffusion coefficient depend on?
What is the range of thickness for diffusion across the respiratory membrane?
What is the range of thickness for diffusion across the respiratory membrane?
Which gas has the lowest diffusion coefficient?
Which gas has the lowest diffusion coefficient?
What does Fick’s Law state about the rate of transfer through a sheet of tissue?
What does Fick’s Law state about the rate of transfer through a sheet of tissue?
What is the primary factor affecting the rate of diffusion of molecules?
What is the primary factor affecting the rate of diffusion of molecules?
What is the relationship between the diffusion coefficient and solubility?
What is the relationship between the diffusion coefficient and solubility?
What is the primary driving force for diffusion of molecules?
What is the primary driving force for diffusion of molecules?
What factor is the diffusion coefficient inversely proportional to?
What factor is the diffusion coefficient inversely proportional to?
What does the diffusion coefficient depend on?
What does the diffusion coefficient depend on?
What is the relationship between the partial pressures of nitrogen and oxygen in normal air at sea level?
What is the relationship between the partial pressures of nitrogen and oxygen in normal air at sea level?
For a given concentration, how does the partial pressure of carbon dioxide (CO2) relate to that of oxygen (O2) dissolved in water/tissue?
For a given concentration, how does the partial pressure of carbon dioxide (CO2) relate to that of oxygen (O2) dissolved in water/tissue?
In the alveolar air, what is the approximate concentration of oxygen (O2) compared to that in atmospheric air?
In the alveolar air, what is the approximate concentration of oxygen (O2) compared to that in atmospheric air?
What is the primary factor affecting the rate of diffusion of molecules?
What is the primary factor affecting the rate of diffusion of molecules?
What determines the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in alveoli?
What determines the partial pressure of oxygen (PO2) and carbon dioxide (PCO2) in alveoli?
In an upright individual, how do ventilation and perfusion (blood flow) change from the apex to the base of the lung?
In an upright individual, how do ventilation and perfusion (blood flow) change from the apex to the base of the lung?
In the anatomic shunt model of ventilation-perfusion abnormalities, what happens to a portion of the cardiac output?
In the anatomic shunt model of ventilation-perfusion abnormalities, what happens to a portion of the cardiac output?
What happens in the physiological shunt model of ventilation-perfusion abnormalities?
What happens in the physiological shunt model of ventilation-perfusion abnormalities?
What is the term for the combined effect of uneven ventilation and anatomic dead space resulting in wasted ventilation?
What is the term for the combined effect of uneven ventilation and anatomic dead space resulting in wasted ventilation?
What is the functional residual capacity (FRC) of the lungs approximately?
What is the functional residual capacity (FRC) of the lungs approximately?
What is the approximate amount of atmospheric air that reaches the alveoli?
What is the approximate amount of atmospheric air that reaches the alveoli?
