Which of the following is the mechanism of action of proton pump inhibitors?
a. noncompetitively inhibits the proton pump in the membrane of the parietal cells
b. neutralizes acid in the membrane of the parietal cells
c. reduces histamine-stimulated gastric acid secretion
d. improves gastric emptying
a. PPIs suppress acid by irreversibly inhibiting the proton pump in the membrane of the parietal cells. This pump is the final common pathway for acid secretion. Thus, PPIs achieve nearly total suppression of acid secretion. To restore acid secretion again, it is necessary to either synthesize new pumps or activate resting pumps, which takes about 3 to 5 days.
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"Citizen access" refers to an advanced form of EMS communications
Indicate whether the statement is true or false
The pressure at which large numbers of alveoli are recruited in a patient with acute respiratory distress syndrome (ARDS) is located on the static pressure-volume curve at which of the follow-ing points?
a. Upper inflection point b. Lower inflection point c. Peak inspiratory pressure d. Between the lower and upper inflection points
Match the following symbols found in the CPT manual to the appropriate meaning.
A. + B. Ø C. >< D. •
What causes stimulation of the peripheral chemoreceptors to increase the ventilatory rate?
a. Pain or anxiety b. PaCO2 of about 40 mm Hg c. PaO2 of about 60 mm Hg d. Venous pH of 7.30 to 7.40