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Membrane potential changes induced by 5-hydroxytryptamine (5-HT), gamma-aminobutyric acid (GABA) and 1,1-dimethyl-4-phenyl piperazinium (DMPP) were recorded from nodose ganglia (NG) by the sucrose-gap method. An amount of 0.002-0.5 mumol of the depolarizing agent was injected into the superfusion stream to the ganglion. Responses to 5-HT were also evoked… (More)
1 The antagonist actions of quipazine on 5-hydroxytryptamine (5-HT) receptors have been investigated in the rabbit isolated superior cervical ganglion and on the rat isolated spinal cord and stomach strip. 2 Changes in membrane potential induced by 5-HT or by the nicotinic agonist, 1,1-dimethyl-4-phenyl piperazinium (DMPP), were measured in the ganglion by… (More)
1 The effects of raising or lowering [Ca(2+)](o) or [Mg(2+)](o) on potential changes evoked by 5-hydroxytryptamine (5-HT) and by the nicotinic agonist, 1,1-dimethyl-4-phenyl piperazinium (DMPP) have been investigated.2 Changes in membrane potential were measured at the ganglion or in postganglionic axons by the sucrose-gap technique. The ganglionic response… (More)
Potential changes in superior cervical ganglion cells evoked by 5-HT or the nicotinic agonist, dimethyl-phenyl piperazinium (DMPP), were recorded using the sucrose-gap method and a number of putative 5-HT antagonists tested for potency and selectivity. Selective blockade of 5-HT responses was produced by 5-HT itself and, in increasing order of potency, by… (More)
Some people believe that exercise is a panacea; they're convinced it can even strengthen their immune system. But immunologists caution that while that belief remains plausible, there is evidence that excessive physical activity might invite infection.
Whether for aesthetic, athletic, or medical reasons, more and more people want a convenient and reliable method of measuring body fat. Research technologists have responded to the demand with electrical impedance units; physiologists are busy examining those units.
Membrane potential changes evoked by 5-Ht and related substances were recorded by the sucrose-gap method from rabbit ganglia superfused with Krebs solution at 20 degrees C. A solution of the substance under test was injected into the superfusion stream. The activity of 23 substances was compared to that of 5-HT in respect of depolarizing capacity. 0.01… (More)
Runners increase the risk of becoming hypothermic or hyperthermic by not training in heat before a hot-weather race and by ignoring their body' a warning signs while running. And once thermal injury occurs, diagnosis and treatment may vary according to who is in charge of the medical tent; discrepancies can be fatal.