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相关概念视频

Buffer Effectiveness02:19

Buffer Effectiveness

Buffer solutions do not have an unlimited capacity to keep the pH relatively constant . Instead, the ability of a buffer solution to resist changes in pH relies on the presence of appreciable amounts of its conjugate weak acid-base pair. When enough strong acid or base is added to substantially lower the concentration of either member of the buffer pair, the buffering action within the solution is compromised.
The buffer capacity is the amount of acid or base that can be added to a given volume...
pH Homeostasis01:31

pH Homeostasis

Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
Respiratory Regulation of...
Acid-Base Balance01:25

Acid-Base Balance

The human body maintains a narrow pH range regulated through acid-base balance. This balance is crucial as changes in the hydrogen ion concentration can disrupt cell membrane stability, alter protein structures, and change enzyme activities. The normal pH of arterial blood is 7.4, venous blood and interstitial fluid is 7.35, and intracellular fluid averages 7.0.
When the pH of arterial blood rises above 7.45, it results in a condition called alkalosis. Conversely, a drop below 7.35 leads to...
Protein Buffers in Blood Plasma and Cells01:20

Protein Buffers in Blood Plasma and Cells

The human body utilizes protein buffer systems to maintain a stable pH. These systems capitalize on the dual role of amino acids, which can act as acids or bases by accepting or releasing hydrogen ions in response to pH changes. Protein buffer systems are particularly significant in the extracellular fluid (ECF) and intracellular fluid (ICF) of active cells, where structural and functional proteins provide substantial buffering capacity.
Certain amino acids can exist in a zwitterion state at a...
Respiratory Regulation of Acid-Base Balance01:18

Respiratory Regulation of Acid-Base Balance

Respiratory compensation is a vital physiological process that stabilizes blood plasma pH by regulating the partial pressure of carbon dioxide (PCO2), a key determinant of pH levels. Most carbon dioxide in the blood dissolves and converts into carbonic acid (H2CO3). It dissociates into hydrogen ions (H+) and bicarbonate ions (HCO3⁻). There is also an inverse relationship between PCO2​​ and pH.
When carbon dioxide levels increase in the blood, more H+ and HCO3⁻ are produced, leading to a...
Disorders of Acid-Base Balance01:29

Disorders of Acid-Base Balance

The human body maintains a precise pH range of arterial blood between 7.35 and 7.45. Deviations result in either acidosis (pH < 7.35) or alkalosis (pH > 7.45). These conditions are further classified as respiratory or metabolic disorders based on their underlying cause.
Respiratory Acidosis and Alkalosis
Respiratory acidosis occurs due to an increase in the partial pressure of carbon dioxide PCO2 in the blood. It often arises from shallow breathing or impaired gas exchange caused by...

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相关实验视频

Updated: Jul 7, 2026

A Convenient Method for Extraction and Analysis with High-Pressure Liquid Chromatography of Catecholamine Neurotransmitters and Their Metabolites
13:35

A Convenient Method for Extraction and Analysis with High-Pressure Liquid Chromatography of Catecholamine Neurotransmitters and Their Metabolites

Published on: March 1, 2018

酸化和封存由精神兴奋剂差异调节的血清载体.

S Ramamoorthy1, R D Blakely

  • 1Department of Pharmacology and Center for Molecular Neuroscience, School of Medicine, Vanderbilt University, Nashville, TN 37232-6420, USA.

Science (New York, N.Y.)
|July 31, 1999
PubMed
概括
此摘要是机器生成的。

精神药物会影响神经递质转运器,如SERT. 干结合会影响转运体活性,通过PKC依赖的途径影响药物的疗效和副作用.

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A Plate-Based Assay for the Measurement of Endogenous Monoamine Release in Acute Brain Slices
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BS3 Chemical Crosslinking Assay: Evaluating the Effect of Chronic Stress on Cell Surface GABAA Receptor Presentation in the Rodent Brain
05:17

BS3 Chemical Crosslinking Assay: Evaluating the Effect of Chronic Stress on Cell Surface GABAA Receptor Presentation in the Rodent Brain

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A Convenient Method for Extraction and Analysis with High-Pressure Liquid Chromatography of Catecholamine Neurotransmitters and Their Metabolites
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科学领域:

  • 神经科学是一个神经科学.
  • 药理学 药理学是指药理学的学科.
  • 分子生物学分子生物学

背景情况:

  • 精神药物可以调节神经递质系统.
  • 激酶通路,包括蛋白激酶C (PKC),调节载体功能.
  • 输送物化和封存是关键的监管机制.

研究的目的:

  • 为了研究连接体占用如何影响蛋白激酶C (PKC) 依赖的血清素转运体 (SERT) 的调节.
  • 阐明运输和非运输连接体对SERT酸化和封存的影响.
  • 了解神经递质再吸收的活动依赖调节.

主要方法:

  • 研究了各种配体 (血清素,安非他命,可卡因,抗抑郁药) 对SERT酸化和封存的作用.
  • 利用生物化学分析来测量输送器活动和调节事件.
  • 研究了PKC在调解这些联结体诱导效应中的作用.

主要成果:

  • 位占用显著影响了SERT酸化和封存.
  • 运输的配体 (血清素,氨基胺) 抑制了PKC依赖的SERT酸化.
  • 非运输抗剂 (可卡因,抗抑郁药) 允许SERT酸化,但阻断了血清的作用.
  • 血清素还抑制了PKC依赖的SERT分离.

结论:

  • 神经递质载体的功能是通过依赖活性的方式通过连接体结合来调节的.
  • 药物作用,包括安非他命,可卡因和抗抑郁药物的作用,对载体调节有以前未知的影响.
  • 研究结果提供了对心理药物疗效和副作用背后的分子机制的见解.