[Effects of different natural stimulants on the activity of the rabbits' carotid chemoreceptor].
Sheng Li Xue Bao
; 48(6): 590-4, 1996 Dec.
Article
en Zh
| MEDLINE
| ID: mdl-9389160
ABSTRACT
The effects of different natural stimulants on the afferent unit discharge of rabbit carotid chemoreceptors were studied in the in vitro carotid body- sinus nerve preparation. A total of 32 chemoreceptive units were recorded. The results were as follows (1) Of the 32 units, 10 (31%) showed chemosensory responses only to PO2 decrease; 9 (28%) to all stimulants (PO2 decrease, PCO2 increase and pH decrease); 9 (28%) to PO2 decrease and PCO2 increase; 3 (9%) to PO2 decrease and pH decrease; only one to pH decrease. (2) The potency of the three natural stimulants in eliciting the changes in intensity of discharge showed a decreasing order as follows PO2 decrease > PCO2 increase > pH decrease. The above results suggest that the carotid body may contain only one or a combination of 2 or 3 kinds of chemoreceptors respectively sensitive to decrease PO2 to increase PCO2 or decrease pH.
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Bases de datos:
MEDLINE
Asunto principal:
Cuerpo Carotídeo
/
Seno Carotídeo
/
Células Quimiorreceptoras
Límite:
Animals
Idioma:
Zh
Revista:
Sheng Li Xue Bao
Año:
1996
Tipo del documento:
Article