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Measurements of potassium changes in the cat carotid body under hypoxia and hypercapnia.
- Source :
- Pflügers Archiv: European Journal of Physiology; 1978, Vol. 375 Issue 3, p229-232, 4p
- Publication Year :
- 1978
-
Abstract
- With the aid of potassium-sensitive microclectrodes reinforced by bitumen (tip diameter, 1.5 μm), extracellular potassium activity ([K]) and DC potential were measured in the cat's carotid body. Under normoxic and normocapnic conditions, potassium values of 1-16 mM (mean value 7.2 mM, standard deviation 3.8 mM) and DC potential values of −11 mV to +13 mV were recorded. With hypoxia, [K] increased by between 1 mM and 9 mM; DC potential was reduced by between 0.5 and 3 mV. With hypercapnia, [K] decreased by between 1 mM and 5 mM: changes in DC potential were variable. The results suggest that, during hypoxia, potassium influences the nervous structures in the carotid body whereas this influence is absent during hypercapnia. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00316768
- Volume :
- 375
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Pflügers Archiv: European Journal of Physiology
- Publication Type :
- Academic Journal
- Accession number :
- 73145351
- Full Text :
- https://doi.org/10.1007/BF00582434