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Related Concept Videos

Minerals01:26

Minerals

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Minerals are essential nutrients that the human body needs in small amounts to work properly. They play a vital role in many bodily functions, such as building strong bones and transmitting nerve impulses. Some minerals are needed for hormone production or to maintain a normal heartbeat. Major minerals include calcium, phosphorus, potassium, sulfur, sodium, chlorine, and magnesium, while trace minerals include iron, manganese, copper, iodine, zinc, cobalt, fluoride, and selenium.
 
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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...
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Vitamins01:30

Vitamins

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Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced...
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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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Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

2.9K
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...
2.9K
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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Related Experiment Video

Updated: May 1, 2026

Making, Testing, and Using Potassium Ion Selective Microelectrodes in Tissue Slices of Adult Brain
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A man with a worrying potassium deficiency.

A Tabasum1, C Shute1, D Datta2

  • 1Diabetes and Endocrinology Cardiff and Vale NHS Trust Penlan Road, Penarth, CF64 2XX, Cardiff, CF14 4BG UK.

Endocrinology, Diabetes & Metabolism Case Reports
|April 1, 2014
PubMed
Summary

Gitelman syndrome (GS) is a rare inherited kidney disorder causing low potassium. Early diagnosis and treatment with salt replacement lead to an excellent prognosis for kidney function and life expectancy.

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Area of Science:

  • Nephrology
  • Endocrinology
  • Genetics

Background:

  • Hypokalaemia, characterized by low potassium levels, can manifest as muscle cramps and cardiac arrhythmias.
  • This electrolyte imbalance is frequently observed by endocrinologists and general physicians.
  • Gitelman syndrome (GS) is a rare, autosomal recessive inherited renal tubular disorder.

Purpose of the Study:

  • To report a case of a 43-year-old gentleman diagnosed with Gitelman syndrome.
  • To highlight the clinical presentation and diagnostic considerations for GS.
  • To emphasize the importance of investigating recurrent hypokalaemia.

Main Methods:

  • Case report of a patient presenting with hypokalaemia.
  • Subsequent investigations to determine the underlying cause.
  • Discussion of the genetic basis and biochemical imbalances in GS.

Main Results:

  • The patient was diagnosed with Gitelman syndrome, linked to mutations in the SLC12A3 gene.
  • GS presents with hypokalaemic metabolic alkalosis and hypomagnesaemia.
  • Long-term potassium and magnesium salt replacement is the standard treatment.

Conclusions:

  • Recurrent hypokalaemia without a clear cause necessitates investigation for hereditary renal tubulopathies like GS.
  • GS is the most prevalent inherited renal tubulopathy, affecting approximately 25 per million people.
  • Molecular analysis for SLC12A3 gene mutations confirms the diagnosis.