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Phys II Week 4

Terms in this set (18)

Exchange of oxygen and CO2 btwn the external environment and the mitochondria
Respiration
Production of ATP by oxidation of carbs, amino acids, or fatty acids; oxygen is consumed and CO2 is produced
Mitochondrial respiration
Gas exchange at the respiratory surface
External respiration
Gas exchange at the tissue
Internal respiration
Rely on diffusion for gas exchange
Unicellular and small multicellular organisms
Rely on a combination of bulk flow and diffusion for gas exchange
Larger organisms
As you increased in altitude, what drops?
-Barometric pressure
-PO2
dO/dt=DxAx(dC/dx)
Fick equation
dO/dt
Rate of diffusion
D=
diffusion coefficient
A=
area of the membrane
DC/dx
gradient
To maximize diffusion, respiratory surfaces are typically ________, with a ________ surface area
thin; large
Dalton's law of Partial Pressure
The pressure exerted by a gas is related to the number of moles of the gas and the volume of the chamber
Ideal Gas Law
PV = nRT
Dalton's law of partial pressure con.
-In a gas mixture, each gas exerts its own partial pressure
-The sum of all partial pressures is equal to the total pressure of the mixture
Henry's Law
-Gas molecules in the air must first dissolve in liquid in order to diffuse into a cell
-The concentration of gas in a liquid is proportional to its partial pressure
Graham's law
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