<prompt> All true about effect of propofol on Respiratory system except-Depresses respiratory centreDepresses respiratory driveBronchodilatorInhibits hypoxic pulmonary vasoconstriction  <response>: Propofol produces doses-dependent respiratory depression with apnea occurring in 25 to 35 patients after induction close. The ventilator response of co2 and apnea also reduces. They are potent bronchodilator. It preserves hypoxic pulmonary vasoconstriction. Blunts upper airway reflexes 