MSU PSL 431 Exam 5 Practice Test
Questions and Answers
the oxygen "loading zone" of the hemoglobin-exygen saturation curve corresponds
to the relatively high oxygen partial pressures (85-105 mm Hg) that are typical found
in? - ANSWER-pulmonary capillaries
carbonic anhydrase catalyzes the - ANSWER-interconversion of carbon dioxide and
carbonic acid
the rate of diffusion of carbon dioxide across the alveolar-capillary interface is faster
than that for oxygen because - ANSWER-carbon dioxide is much more soluble in
body tissued than oxygen is
how do changes in temperature and pressure influence water vapor pressure
(PH2O) in the air we breathe? - ANSWER-P H2O increases with temperature, but is
independent of pressure
in which blood vessel(s) would you expect to be able to measure the highest carbon
dioxide partial pressure (P CO2) - ANSWER-the pulmonary arteries
according to ficks law of diffusion the rate of exygen exchange across the alveolar-
capillary interface depends on... - ANSWER--the diffusion distance between alveolar
air and pulmonary capillary blood
-the oxygen partial pressure gradient across the alveolar-capillary interface
-the surface area available of oxygen diffusion
the majority of carbon dioxide that is transported from cells and tissues to the lungs
exists in blood in the form of - ANSWER-bicarbonate ion (HCO3-) that was
generated from CO2 by the action of carbonic anhydrase
chemical oxidation of the heme iron within hemoglobin from the ferrous (Fe+2) to the
ferric (Fe+3) state results in the production of inactive what? - ANSWER-
methemoglobin
what effect would an increase in alveolar ventilation have onthe composition of
arterial blood - ANSWER-it would raise the pH of arterial blood
what changes in compostion of arterial blood will reduce ventilatory drive, causing a
decrease in the depth and frequency of breathing? - ANSWER-a drop in arterial P
CO2 from 40 to 35 mm Hg
Questions and Answers
the oxygen "loading zone" of the hemoglobin-exygen saturation curve corresponds
to the relatively high oxygen partial pressures (85-105 mm Hg) that are typical found
in? - ANSWER-pulmonary capillaries
carbonic anhydrase catalyzes the - ANSWER-interconversion of carbon dioxide and
carbonic acid
the rate of diffusion of carbon dioxide across the alveolar-capillary interface is faster
than that for oxygen because - ANSWER-carbon dioxide is much more soluble in
body tissued than oxygen is
how do changes in temperature and pressure influence water vapor pressure
(PH2O) in the air we breathe? - ANSWER-P H2O increases with temperature, but is
independent of pressure
in which blood vessel(s) would you expect to be able to measure the highest carbon
dioxide partial pressure (P CO2) - ANSWER-the pulmonary arteries
according to ficks law of diffusion the rate of exygen exchange across the alveolar-
capillary interface depends on... - ANSWER--the diffusion distance between alveolar
air and pulmonary capillary blood
-the oxygen partial pressure gradient across the alveolar-capillary interface
-the surface area available of oxygen diffusion
the majority of carbon dioxide that is transported from cells and tissues to the lungs
exists in blood in the form of - ANSWER-bicarbonate ion (HCO3-) that was
generated from CO2 by the action of carbonic anhydrase
chemical oxidation of the heme iron within hemoglobin from the ferrous (Fe+2) to the
ferric (Fe+3) state results in the production of inactive what? - ANSWER-
methemoglobin
what effect would an increase in alveolar ventilation have onthe composition of
arterial blood - ANSWER-it would raise the pH of arterial blood
what changes in compostion of arterial blood will reduce ventilatory drive, causing a
decrease in the depth and frequency of breathing? - ANSWER-a drop in arterial P
CO2 from 40 to 35 mm Hg
