BIPN 102 Midterm 2 Questions And Answers With Latest Quiz
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Course
BIPN 102
Institution
BIPN 102
emphysema and fick's equation - airway obstruction as a result of inorganic particles --> triggers
the production of elastase which breaks down elastin --> alveoli lose elastance --> alveoli recoil -->
increase in T and decrease in A --> lower gas exchange
inspired partial pressur...
BIPN 102 Midterm 2
emphysema and fick's equation - airway obstruction as a result of inorganic particles --> triggers
the production of elastase which breaks down elastin --> alveoli lose elastance --> alveoli recoil -->
increase in T and decrease in A --> lower gas exchange
air conditioning during inhalation: adds warmth and moisture to the gas --> water gets evaporated in the
mucosa, generating a water pressure which decreases the atmospheric pressure
at 37C, Ph2o= 47 mmHg
dalton's law - Pair = Po2 + Pn2 + Pco2 + Par
henry's law - C = alphaP
the concentration/amount of a dissolved gas is a function of the gas's Pp and solubility coefficient
fick's equation - V = ((PA-Pb)*A*D/)T OR V/A = ((PA-Pb)*D/)T
V = flow rate
PA-Pb = pressure gradient
A = surface area
D = diffusion coefficient
, T = thickness/distance
V/A = net rate of particles moving through A; flux
(PA-Pb)/T = change in P over a distance
D*A/T = diffusion capacity, D(L)
fibrosis and fick's equation - smoke cannot be destroyed by macrophages --> production of
collagen --> collagen/scar tissue on the alveoli --> increase in T --> decrease in gas exchange
edema and fick's equation - swelling and increased fluid in the interstitial space --> increase in T
(greater diffusion distance) --> decrease in gas exchange
asthma and fick's equation - hyper responsiveness/sensitivity of the airways --> airway
obstruction, swelling, mucus, etc --> increase in T --> decrease in gas exchange
perfusion limited gas exchange - - gas exchange is limited by the blood flow rate through the
capillaries
- the pressure in the capillaries and alveoli equilibrate quickly, usually within 1/3 of transportation time
- diffusion can happen effectively and the limiting factor is how fast the blood is moving through the
capillary and how much hemoglobin we have that binds to the blood
- normal with oxygen
pulmonary circulation resistance and pressure change - - increase in pulmonary pressure
decreases pulmonary resistance
- capillaries can collapse at low pressures/blood flow --> when pressure is increased, they are recruited
(open up) --> continued increases in pressure cause capillary distention (even more dilation) --> as a
result, more pathways are opened and resistance decreases
ventilation/perfusion ratios - V/Q = 1
- ventilation and perfusion are matched
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