Chapter 19.4 Gas Exchange and Transport-Respiratory System Flashcards
What do gas molecules behave due to Dalton’s law?
Undergo continuous random motion
Collide with each other: pressure
closer together more pressure
What happens if there is anything that increases movement of molecules?
it also increases pressure: for example, temperature
What is pressure directly proportional to?
directly proportional to temperature
What is Dalton’s law?
In mixture of gases, pressure exerted by each gas is independent of other gases
What is total pressure equal to?
equal to sum of partial pressures
When will molecules of gas will dissolve in liquid?
When liquid (blood) is exposed to air containing gas(oxygen)
What is Henry’s law?
partial pressure of oxygen in air (21%) is proportional to amount dissolved in blood
What happens If we breathe higher concentration of oxygen
More will dissolve into blood
In reverse, what happens if partial pressure is higher in blood
CO2 will diffuse out of blood into gas phase
What is Diffusion?
movement of molecules from higher to lower concentration
What is Hyperventilation?
increased breathing rate
What is Hypocapnia caused by hyperventilation?
low CO2
What is Respiratory alkalosis caused by hyperventilation?
high blood pH
What are symptoms when there is hyperventilation?
dizziness, tingling in fingers, toes, and face, and weakness, and may cause fainting
What is Hypoventilation?
decreased breathing rate
