Respiratory Physiology Lecture 3

What is Eupnoea

What is Hypernoea?

What is Hyperventilation?

What is hypoventilation

What is Tachypnoea?

What is Dyspnoea?

What is Apnoea?

Diffusion of Gases is influenced by

Diffusion through tissue's is described by [blank_start]Fick[blank_end]'s Law

For diffusion through a tissue sheet, the amount of a gas transferred is proportional to [blank_start]Area available for diffusion (A)[blank_end], [blank_start]Diffusion constant (D)[blank_end], [blank_start]Difference in partial pressure (P1‐P2)[blank_end] and inversely proportional to [blank_start]thickness of the tissue (T)[blank_end]

Diffusion constant is [blank_start]proportional[blank_end] to the gas solubility (Sol) and [blank_start]inversely proportional[blank_end] to square root of its molecular weight.

Which diffuses into the lungs quicker? CO2 or O2?

Which of the following bind to Haemoglobin?

Transfer of CO is [blank_start]diffusion limited[blank_end]. Amount taken up depends on how much CO is available

N2O transfer is [blank_start]perfusion limited[blank_end]. Amount taken up depends on how much blood can flow through

At rest a RBC spends how much time in an alveolar capillary?

During exercise how low can the time a RBC spends in an alveolar capillary drop to?

Which of the following are measurements of diffusing capacity?

What is the normal value of diffusing capacity for CO at rest?

What is the ratio of breath alcohol to blood alcohol?

At rest, the PO2 of the blood virtually reaches that of the alveolar gas after about 1/3 of its time in the capillary so O2 transfer is really only limited by [blank_start]perfusion[blank_end]