Effects of different concentrations of G. straminea ethanol extract on survival time in (A) soda lime normobaric hypoxia test, (B) NaNO2 poisoning test, (C) isoproterenol hypoxia test, (D) and acute cerebral ischemic hypoxia test.

Notes: *P <0.05 vs. model group, NS, not significant. N=6 in each treatment. 1: model; 2: 30 mg/kg propranolol; 3: 10 g/kg ethanol extraction; 4: 5 g/kg ethanol extraction; 5: 2.5 g/kg ethanol extraction..