The action potential is an explosive depolarization of the plasma membrane. It can be driven by the influx of calcium ions through voltage-gated calcium channels, as in the sea urchin egg, or sodium ions through voltage-gated sodium channels, as in human nerve cells. Action potentials travel ...
Neurones communicate via action potentials. These are changes in the voltage across the membrane, occurring due to the flow of ions into and out of the neurone. This article will discuss how action potential generation and conduction occurs.
百度试题 结果1 题目Which of the following about action potential is wrong? A. all or none B. unattenuated potential C. has refractory period D. stimulus dependence 相关知识点: 试题来源: 解析 D 反馈 收藏
Action potential threshold of hippocampal pyramidal cells in vivo is increased by recent spiking activity. Neuroscience 105, 121–130 (2001). CAS PubMed Google Scholar de Polavieja, G. G., Harsch, A., Kleppe, I., Robinson, H. P. & Juusola, M. Stimulus history reliably shapes action ...
The concentration of Na+ in the cell is higher than that outside of the cell C. When the cells are stimulated and excited, Na+ channels open to cause Na+ outflow D. The Na+ channel is inactivated, the K+ channel is further opened, and the action potential naturally drops. ...
百度试题 题目During which phase of the ventricular action potential is the membrane potential closest to the K+ equilibrium potential? A. Phase 0 B. Phase 1 C. Phase 2 D. Phase 3 E. Phase 4 相关知识点: 试题来源: 解析 E 反馈 收藏 ...
Describe the formation mechanism and characteristics of action potential 相关知识点: 试题来源: 解析 答案:离子机制:1、当细胞受到刺激时,首先引起受刺激部位的静息电位降低,称为局部去极化。2、在静息电位降低到临界水平时,膜上的Na+通道被激活,膜对Na+的通透性突然增大,这个造成膜对Na+通透性突然增大的临界水平...
Related to potential, action:Cardiac action potential action potential n. A momentary change in electrical potential on the surface of a cell, especially of a nerve or muscle cell, that occurs when it is stimulated, resulting in the transmission of an electrical impulse. ...
In the far field ear lobe/vertex recordings this interaction is found to be minimum, and the latency of the Jewett V-wave shows that, irrespective of the intensity, this activity is generated 4.25 msec later than the compound cochlear action potential. This might indicate the same degree of ...
aБожественноепоклонятьсяждеткмне 要崇拜等候神对我[translate] athe measured potential is more negative than the true potential at cathodic zones and more positive at anodic ones. 被测量的潜力比真实的潜力是消极在负极区域和正面在正极那些。[translate]...