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関連する概念動画

The Resting Membrane Potential01:21

The Resting Membrane Potential

141.9K
Overview
141.9K
Resting Potential Decay01:15

Resting Potential Decay

6.2K
The resting membrane potential of a neuron (-70mV) is sustained due to the selective ion permeability of the membrane. At the resting potential, the membrane is slightly permeable to ions like sodium (Na+) and chloride (Cl−) and highly permeable to potassium ions (K+). Differences in the ions' concentration inside the cell compared to the outside are maintained by membrane transport proteins like channels and pumps.
At rest, the K+ is the main ion that moves across the membrane...
6.2K
Resting Membrane Potential01:24

Resting Membrane Potential

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The relative difference in electrical charge, or voltage, between the inside and the outside of a cell membrane, is called the membrane potential. It is generated by differences in permeability of the membrane to various ions and the concentrations of these ions across the membrane.
The Inside of a Neuron is More Negative
The membrane potential of a cell can be measured by inserting a microelectrode into a cell and comparing the charge to a reference electrode in the extracellular fluid. The...
21.4K
Voltage01:13

Voltage

3.8K
The movement of electrons in a conductor requires some form of energy or work, usually provided by an external force, like a battery. This force is called the electromotive force or voltage. The voltage between two points, referred to as points "a" and "b," in an electric circuit is the energy (or work) needed to move a unit charge from point "a" to point "b," and this relationship is expressed mathematically as
3.8K
The Sense of Self: Reflected Self-Appraisal and Social Comparison02:57

The Sense of Self: Reflected Self-Appraisal and Social Comparison

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According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
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Pressure Variation in a Fluid at Rest01:11

Pressure Variation in a Fluid at Rest

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In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...
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Application of Voltage in Dynamic Light Scattering Particle Size Analysis
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Application of Voltage in Dynamic Light Scattering Particle Size Analysis

Published on: January 24, 2020

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電圧 感知 が 停止 する

Izhar Karbat1, Eitan Reuveny1

  • 1Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.

Cell
|August 10, 2019
PubMed
まとめ
この要約は機械生成です。

研究 者 たち は 静止 状態 の 電圧 ゲート 式 の ナトリウム チャンネル の 構造 を 明らか に し まし た. これは 細胞内で電気信号が どのように生成され 伝播されるのか 重要な洞察を与えてくれます

さらに関連する動画

Virtual Hand with Ambiguous Movement between the Self and Other Origin: Sense of Ownership and 'Other-Produced' Agency
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Measuring the Induced Membrane Voltage with Di-8-ANEPPS
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Last Updated: Jan 21, 2026

Application of Voltage in Dynamic Light Scattering Particle Size Analysis
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Virtual Hand with Ambiguous Movement between the Self and Other Origin: Sense of Ownership and 'Other-Produced' Agency
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Measuring the Induced Membrane Voltage with Di-8-ANEPPS
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科学分野:

  • 分子生物学
  • バイオ物理学
  • 細胞生理学

背景:

  • イオンチャネルによる電圧感知は,興奮性細胞の電気活動に不可欠です.
  • これらのチャネルの構成状態を理解することは 細胞の電気信号を解読する鍵です

研究 の 目的:

  • 高解像度ナトリウムチャネルの構造を表示する.
  • この重要なイオンチャネルの休憩閉じた形状を明らかにする.

主な方法:

  • X線結晶学や冷凍電子顕微鏡 (Cryo-EM) が使用された可能性が高い.
  • 構造分析と分子モデリングの技術が利用されました.

主要な成果:

  • 閉じた状態の電圧ゲートナトリウムチャネルの詳細な原子モデルが決定された.
  • 静止状態を安定させる重要な構造的特徴が特定された.

結論:

  • 決定された構造は,電圧感知メカニズムのための分子基盤を提供します.
  • この構造的な洞察は ニューロンや筋肉細胞における 電気信号の発生と伝播の理解を 進歩させています