Table 2 EC50 values from isolated, perfused trachea experiments

Mean ± S.E.M

Mean  ±S.E.M

5.98 ± 0.18

2.80 ± 0.17

5.50 ± 0.18

2.63 ± 0.25

5.69 ± 0.54

2.81 ± 0.15

5.21 ± 0.39

2.37 ± 0.25

4.98 ± 0.33

2.92 ± 0.18

5.38 ± 0.15

2.88 ± 0.11

5.01 ± 0.46

2.35 ± 0.15

5.37 ± 1.08

2.64 ± 0.19

5.50 ± 0.18

3.03 ± 0.18

5.44 ± 0.09

3.20 ± 0.07

6.06 ± 0.20

3.76 ± 0.62

5.93 ± 0.21

2.97 ± 0.38