Table 1.

Summary of changes in membrane capacitance in enternal solutions containing adrenaline or dopamine.

Agents	N	Cm before GTP-S internalization (pF)	Cm after GTP-S internalization (pF)	ΔCm (pF)
External solution (control)	9	9.29 ± 0.37	34.0 ± 2.79	24.7 ± 2.64
1 μM adrenaline	6	9.89 ± 0.72	27.4 ± 7.21	17.5 ± 6.83∗
10 μM adrenaline	7	9.29 ± 1.07	28.3 ± 2.07	19.0 ± 2.03∗
100 μM adrenaline	8	9.73 ± 0.92	17.3 ± 2.49	7.61 ± 2.49∗
1 μM adrenaline	6	10.1 ± 0.86	15.5 ± 3.28	5.41 ± 2.90
External solution (control)	5	8.18 ± 0.94	30.8 ± 1.89	22.6 ± 7.21
1 μM adrenaline	8	11.6 ± 1.27	36 ± 2 ± 11.2	24.5 ± 3.70
10 μM adrenaline	5	8.22 ± 0.77	31.8 ± 3.14	23.6 ± 2.94
100 μM adrenaline	6	8.84 ± 1.23	30.2 ± 7.69	21.3 ± 7.13
1 μM adrenaline	8	8.05 ± 0.52	33.4 ± 4.95	25.3 ± 4.77

Values are means ± SEM. Cm: membrane capacitance. ^∗p < 0.05 vs. ΔCm in external solution.