Browsing by Author "Zapata, Patricio"
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- ItemA Model of Internal Control May Improve the Response Time of An Automatic Arterial Pressure Controller(1999) Urzúa Urzúa, Jorge; Cipriano, Aldo; Guarini Hermann, Marcelo Walter; Zapata, Patricio
- ItemA report on the evolution of this journal and an analysis of its present state and perspectives(1994) Zapata, Patricio
- ItemAcetylcholine Sensitivity in Sensory Neurons Dissociated From the Cat Petrosal Ganglion(2000) Varas, Rodrigo; Zapata, Patricio
- ItemAcute Ventilatory and Circulatory Reactions Evoked by Nicotine: Are They Excitatory or Depressant?(2002) Fernández, R.; Zapata, Patricio
- ItemAdenosine Triphosphate-Induced Peripheral Nerve Discharges Generated From the Cat Petrosal Ganglion in Vitro(2000) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemAre there interactions between acetylcholine- and ATP-induced responses at the level of a visceral sensory ganglion?(2006) Reyes, Edison-Pablo; Alcayaga, Julio; Zapata, PatricioWe investigate possible interactions between acetylcholine (ACh)- and adenosine 5'-triphosphate (ATP)-induced responses of petrosal ganglion, where the perikarya of most sensory neurons of the glossopharyngeal nerve are located. Experiments were performed on petrosal ganglia excised from pentobarbitone-anesthetized cats, desheathed and perfused in vitro. Separate applications of ACh and ATP to the exposed surface of the ganglion induced bursts of antidromic potentials recorded from the carotid (sinus) nerve branch of the glossopharyngeal nerve, which frequencies were dependent on the dose of the applied agonists. The simultaneous application of previously determined ED(50)s of ACh and ATP provoked responses corresponding closely to the simple addition of the responses elicited by the separate application of each agent. Responses usually subsided within 1 min of stimuli application but were followed by periods of refractoriness to subsequent application of the same agent. After determining the timing for recovering from desensitization to the ED50s of ACh and ATP applied separately, ACh was applied while the preparation had been desensitized to ATP and then ATP was applied during desensitization to ACh, but responses obtained were similar to control responses induced by each agent separately. In summary, ACh- and ATP-induced responses of petrosal ganglion neurons are simply additive, followed by a few minute lasting desensitization, but cross-desensitization was not observed. Thus, ACh and ATP seem to operate through independent receptors, activating separate ionic channels, whose coincident currents do not interfere each other. (c) 2006 Elsevier B.V. All rights reserved.
- ItemCardiovascular Responses to Hyperoxic Withdrawal of Arterial Chemosensory Drive(2009) Zapata, Patricio; Rivera Aguilera, Marco Antonio.
- ItemCatecholamine Release From Isolated Sensory Neurons of Cat Petrosal Ganglia in Tissue Culture(2003) Iturriaga Agüera, Rodrigo; Zapata, Patricio; Alcayaga Urbina, Julio Andrés
- ItemCoherence of Chemosensory Discharges in Cats' Carotid Nerves(1996) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemComparison of the subcellular distribution of alveolar surfactant in two mammalian species of similar body weight: cat and rabbit(1992) Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemDefinicion de Investigacion Biomedica(1992) Zapata, Patricio
- ItemDissociation of Hypoxia-Induced Chemosensory Responses and Catecholamine Efflux in Cat Carotid Body Superfused in Vitro(1996) Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemDomperidone As a Tool to Assess the Role of Dopamine Within Carotid Body Chemoreception(1996) Zapata, Patricio; Iturriaga Agüera, Rodrigo
- ItemDopamine Efflux From the Carotid Body During Hypoxic Stimulation(1996) Zapata, Patricio; Iturriaga Agüera, Rodrigo; Alcayaga Urbina, Julio Andrés
- ItemDopamine Inhibits ATP-Induced Responses in the Cat Petrosal Ganglion in Vitro(2003) Alcayaga Urbina, Julio Andrés; Zapata, Patricio
- ItemDopamine Modulates Carotid Nerve Responses Induced by Acetylcholine on Cat Petrosal Ganglion in Vitro(1999) Alcayaga Urbina, Julio Andrés; Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemEffects of Body Temperature on Chemosensory Activity of the Cat Carotid Body in Situ(1991) Cardenas, H.; Zapata, Patricio
- ItemEffects of dopaminergic blockade upon carotid chemosensory activity and its hypoxia-induced excitation(1994) Iturriaga Agüera, Rodrigo; Zapata, Patricio
- ItemFactors Affecting Distribution of Alveolar Surfactant During Resting Ventilation(1991) Oyarzún, M.; Iturriaga Agüera, Rodrigo; Santos Alcántara, Manuel; Zapata, Patricio