In this study, we examined the decremental response in the hair cell-afferent fibre synapse of goldfish. This decremental response is a transient reduction in sound-evoked EPSPs associated with a step reduction in sound intensity. To determine its presynaptic correlates, a patch clamp study was ...
Microelectrode impalement of human macrophages evokes a transient hyperpolarizing response (HR) of the membrane potential. This HR was found to be dependent on the extracellular concentration of K+but not on that of Na+or Cl−. It was not influenced by low temperature (12°C) or by 0.2mmo...
The exchange of information between a cell and its environment is frequently mediated by ionic movements through the plasma membrane. The physiology of sea urchin sperm is a representative case in which this phenomenon occurs. For instance, when these cells are spawned into sea water, their motilit...
In summary a wide variety of experiments with axons provides kinetic, electrochemical, and pharmacological evidence that three types of channels through the membrane contribute to the ionic permeability changes underlying action potentials. In normal function one channel accounts for most of the movements...
Voltage-gated and receptor-mediated ionic currents in the membrane of endothelial cells 来自 NCBI 喜欢 0 阅读量: 23 作者:PD Bregestovski,US Ryan 摘要: Bregestovski PD, Ryan US.关键词:Endothelium, Vascular Animals Cattle Humans Histamine Thrombin Platelet Activating Factor Bradykinin Ion Channels ...
Integrated circuits are present in all electronic devices, and enable signal amplification, modulation, and relay. Nature uses another type of circuits composed of channels in a cell membrane, which regulate and amplify transport of ions, not electrons and holes as is done in electronic systems. ...
Fedulova, S. A., Kostyuk, P. G., and Veselovsky, N. S., 1981, Calcium channels in the somatic membrane of the rat dorsal root ganglion neurons, effect of cAMP,Brain Res.214:210–214. ArticlePubMedCASGoogle Scholar Fox, A., 1981, Voltage-dependent inactivation of a calcium channel,...
It is concluded that the high-conductance voltage-dependent ionic channels active during the HR in human macrophages contribute to the development of the HR. 展开 关键词: ionic channels patch-clamp technique human macrophages calcium-dependent potassium conductance membrane potential ...
Substitution of intracellular potassium by sodium ions showed that the PNa:PK ratio was 7:1. A calcium ionic current was not observed in the majority of the investigated cells. A relatively low potassium conductance was observed. Thus in some respects the neuroblastoma cell membrane resembles that...
aureofuscin channels were more permeable to potassium ion than to chlorideion(P_k/P_(cl)≈5.2).These data may be used to explain the action of aureofuscinon neurotransmitter release and muscle membrane potential in addition to pro-viding some explanation on its curing effect in clinical use....