Morphine causes respiratory depression by:
a) depression of respiratory center in brain***
b) activation of respiratory center in brain
c) depression of CTZ receptors center in brain
d) activation of CTZ receptors center in brain.
a) depression of respiratory center in brain***
b) activation of respiratory center in brain
c) depression of CTZ receptors center in brain
d) activation of CTZ receptors center in brain.
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pharmac