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Related Concept Videos

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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Antihypertensive Drugs: Potassium-Sparing Diuretics01:28

Antihypertensive Drugs: Potassium-Sparing Diuretics

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Liddle syndrome is a genetically inherited form of hypertension characterized by the overactivity of epithelial sodium channels in the nephron, the functional unit of the kidney. This heightened activity leads to increased sodium reabsorption and excessive excretion of potassium. To counteract this, potassium-sparing diuretics such as amiloride are used. They function by blocking these sodium channels, thereby reducing the influx of sodium into the epithelial cells and minimizing the loss of...
2.0K
Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

1.7K
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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pH Regulation in Cells01:28

pH Regulation in Cells

7.3K
pH plays a critical role in maintaining normal cellular activities. It helps maintain the structure and function of various proteins, dictates the charge on cellular membranes, and is crucial for metabolic reactions inside the cell. Moreover, cells use the energy from the proton motive force to generate ATP.
Cytosolic pH
Under physiological conditions, the cytosolic pH is slightly more acidic than the extracellular pH. However, cells must prevent further acidification of their cytosol to...
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Resting Potential Decay01:15

Resting Potential Decay

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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...
5.8K
Transcellular Transport of Solutes01:23

Transcellular Transport of Solutes

4.4K
Transcellular transport of solutes is the movement of substances like monosaccharides and amino acids through polarized cells. This transport mechanism is primarily seen in epithelial and endothelial cells aided by membrane transport proteins such as channels and transporters. The tight junctions between these cells confine the membrane proteins to the two sides of the cell. The epithelial cells have distinct apical and basolateral domains. In contrast, the endothelial cells show the luminal...
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Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
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Potassium: A key modulator for cell homeostasis.

Prasann Kumar1, Tapan Kumar2, Simranjeet Singh3

  • 1Division of Research and Development, Lovely Professional University, Jalandhar, Punjab, 144411, India; Department of Agronomy, School of Agriculture, Lovely Professional University, Jalandhar, Punjab, 144411, India.

Journal of Biotechnology
|October 20, 2020
PubMed
Summary

Potassium (K) is essential for plant growth, enzyme activation, and stress resistance. This review covers K

Keywords:
2-Aminoethyl vinyl-glycine (ethylene inhibitor)BiotiteEthephon (ethylene stimulator)Feldspars, siliconGrowth regulatorsIndole-3-acetic acid (IAA)Jasmonic acidMicrobesNaphthalene acetic acid (NAA)Potash, MuscovitePotassiumPotassium chloride (KCl)Potassium ion channelPotassium oxide (K(2)O)Transporters

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Area of Science:

  • Plant Physiology
  • Soil Science
  • Biochemistry

Background:

  • Potassium (K) is a vital macronutrient for plant development, second only to nitrogen in importance.
  • Soil dynamics and root interactions can lead to unpredictable K availability for plants.
  • K deficiency or excess causes various plant diseases and impacts overall growth.

Purpose of the Study:

  • To review current research on the critical roles of potassium in plants.
  • To highlight the influence of soil microbes, plant uptake, deficiency, transporters, and abiotic stress on K's function.
  • To identify future research directions for potassium in plant science.

Main Methods:

  • Literature review of existing research on potassium in plants.
  • Analysis of studies focusing on microbial effects on soil K+, K+ adsorption, deficiency, transporters, and stress interactions.

Main Results:

  • Potassium activates over 60 plant enzymes and regulates crucial physiological functions.
  • K is vital for plant resistance to both abiotic and biotic stresses.
  • Understanding K+ transporters and channels is key to plant nutrient management.

Conclusions:

  • Potassium plays a multifaceted role in plant health, growth, and stress tolerance.
  • Further research is needed to fully elucidate K's mechanisms and optimize its use in agriculture.
  • Integrated approaches considering soil, microbes, and plant physiology are essential for managing plant potassium nutrition.