Table 1.

Summary of Δ[Ca²⁺]_i from responsive aortic body and carotid body type I cells

	Hox	10% CO2, pH ∼7.4	5% CO2, pH ∼6.9	10% CO2, pH ∼7.1	30 mm KCl
AB
Mean ± SEM (nm)	69.3 ± 8.2	62.8 ± 9.1	89.7 ± 19.4	56.0 ± 5.4	118.6 ± 5
% responsive	8	63	41	13	100
n (total)	160	52	37	250	265
CB
Mean ± SEM (nm)	45.7 ± 3.9	76.7 ± 5.6	53.4 ± 4.8	46.5 ± 2.2	207.5 ± 6
% responsive	26	84	51	48	100
n (total)	262	97	76	310	341