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相关概念视频

Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

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The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily...
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Roles of Electrolytes: Sodium and Potassium01:24

Roles of Electrolytes: Sodium and Potassium

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Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
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Voltage-gated Ion Channels01:26

Voltage-gated Ion Channels

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Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
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Ionic Bonds00:42

Ionic Bonds

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Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
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Introduction to Electrolytes01:33

Introduction to Electrolytes

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In humans, electrolytes play a vital role in various physiological processes. Balancing electrolyte levels is essential for normal body functions; their imbalance can be life-threatening. The major electrolytes include sodium, potassium, chloride, calcium, phosphate, and bicarbonate. They are primarily involved in physiological processes, such as nerve signal transmission, membrane trafficking, muscle contraction, buffering body fluids, and balancing water levels in the body.
Role of Sodium
One...
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Ionic Strength: Overview01:12

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The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution...
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相关实验视频

Updated: Jul 27, 2025

Fluorescent Nanoparticles for the Measurement of Ion Concentration in Biological Systems
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Fluorescent Nanoparticles for the Measurement of Ion Concentration in Biological Systems

Published on: July 4, 2011

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纳的表达方式

Keiko Mitsunaga-Nakatsubo1, Miyuki Kanda1, Ken Yamazaki1

  • 1Department of Biology, School of Education, Waseda University, 1-6-1, Nishiwaseda, Shinjuku-ku, Tokyo 169-50, Japan.

Development, growth & differentiation
|June 7, 2023
PubMed
概括

海胚胎发育显示在胃流动过程中增加了-ATPase (Na+,K+-ATPase) 活性和mRNA水平. 这种酶是这种酶.

关键词:
(海膽胚胎是一個海膽胚胎.Na+,K+-ATP 酶是一种动物化是一种动态化.皮肤外的细胞细胞是什么?植物化的植被化.

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Camera-based Measurements of Intracellular [Na+] in Murine Atrial Myocytes
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Camera-based Measurements of Intracellular [Na+] in Murine Atrial Myocytes
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Functional Characterization of Na+/H+ Exchangers of Intracellular Compartments Using Proton-killing Selection to Express Them at the Plasma Membrane
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科学领域:

  • 发展生物学 发展生物学
  • 分子生物学分子生物学
  • 海洋生物学 海洋生物学

背景情况:

  • - ATPase (Na+,K+-ATPase) 对于细胞功能和发育至关重要.
  • 了解海胚胎发生过程中的基因表达动态,可以了解细胞分化.
  • 之前的研究表明,离子运输在早期发育中的重要性.

研究的目的:

  • 为了研究海胚胎发育过程中Na+,K+-ATPase活性和mRNA水平的变化.
  • 确定Na+,K+-ATPase在细胞分化中的作用,特别是外皮形成.
  • 为了将Na+,K+-ATPase基因表达与实验诱导的发育模式 (动物化和植物化) 相关联.

主要方法:

  • 北方斑点分析用于检测和量化Na+,K+-ATPasemRNA水平.
  • 使用cDNA克隆和杂交技术识别和探测Na +,K +-ATPaseα子单元mRNA.
  • 进行了酶活性测定,以测量Na+,K+-ATPase活性在不同的胚胎部分和实验性操纵胚胎中.

主要成果:

  • 在游泳芽细胞和晚期胃细胞阶段之间观察到Na+,K+-ATPasemRNA水平和活性显著增加.
  • 较高的Na+,K+-ATPasemRNA水平被发现在外皮细胞部分与中皮和内皮部分相比.
  • 动物化胚胎表现出较高的Na+,K+-ATPase活性和mRNA,而植物化胚胎与正常胚胎相比显示出较低的水平.

结论:

  • Na+,K+-ATPase基因的表达在海胚胎发生的特定阶段上调,与外皮分化相吻合.
  • 增加的Na+,K+-ATPase基因表达作为一个分子标记物用于后胃肠海胚胎内外皮细胞分化.
  • 该研究强调了离子运输调节与胚胎发育早期细胞命运决定之间的联系.