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Related Concept Videos

Disorder of Water Balance01:29

Disorder of Water Balance

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Water balance disorders are medical conditions that occur when there is a deviation from the body's water volume or osmolarity, disrupting normal homeostasis and leading todehydration, hypotonic hydration, hyperhydration, edema, or water intoxication.
Dehydration
Dehydration occurs when the body loses fluids (particularly water).
Causes:
The major causes of dehydration include excessive sweating, fever, vomiting, diarrhea, and diuresis.
Signs and Symptoms:
Symptoms primarily include intense...
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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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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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Regulation of Water Intake01:25

Regulation of Water Intake

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Osmolality refers to the number of solute particles per kilogram of solvent in a solution. Plasma osmolality specifically indicates the total number of solute particles per kilogram of water in blood plasma. This value reflects the body's hydration status and is tightly regulated through mechanisms controlling water intake and output. While water consumption is a conscious decision, the body has intrinsic regulatory systems to maintain fluid balance. Dehydration, a state of water deficit...
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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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Physiology of the Genitourinary System III: Urine Concentration and Dilution01:20

Physiology of the Genitourinary System III: Urine Concentration and Dilution

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The kidneys concentrate or dilute urine to maintain water and electrolyte balance. Nephrons, particularly the loop of Henle, play a crucial role in this process through the countercurrent multiplication system. This system establishes a high osmolarity in the renal medulla, which is essential for water reabsorption. In the loop of Henle’s descending limb, water is reabsorbed into the surrounding medulla due to its permeability to water. In contrast, the ascending limb actively transports...
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Updated: Dec 26, 2025

Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells
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Isolation and Adoptive Transfer of High Salt Treated Antigen-presenting Dendritic Cells

Published on: March 5, 2019

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[Hypernatremia].

Michael Broll, Stefan John1

  • 1Medizinische Klinik 8, Klinikum Nürnberg, Paracelsus Medizinische Privatuniversität Nürnberg, Breslauer Straße 201, 90471, Nürnberg, Deutschland. stefan.john@klinikum-nuernberg.de.

Medizinische Klinik, Intensivmedizin Und Notfallmedizin
|March 18, 2020
PubMed
Summary
This summary is machine-generated.

Hypernatremia, a common electrolyte disorder, arises from water imbalance or excess salt. Rapid correction can cause cerebral edema, emphasizing slow management and assuming chronic conditions if duration is unknown.

Keywords:
Hypernatremia, acuteHypernatremia, chronicOsmolalityWater-electrolyte imbalanceWater–electrolyte balance

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Area of Science:

  • Internal Medicine
  • Nephrology
  • Clinical Practice

Background:

  • Hypernatremia is a frequent electrolyte disturbance encountered in clinical settings.
  • It results from free water deficit or excessive salt intake.
  • Causes vary between out-of-hospital (water loss/inadequate intake) and hospital-acquired (fluid imbalance, saline overload, osmotic diuresis) settings.

Purpose of the Study:

  • To elucidate the causes and consequences of hypernatremia.
  • To highlight the importance of osmolality in cellular function.
  • To emphasize the risks associated with rapid correction of electrolyte imbalances.

Main Methods:

  • Review of clinical practice data on hypernatremia.
  • Analysis of physiological consequences of hypernatremia.
  • Discussion of management principles for electrolyte disorders.

Main Results:

  • Hypernatremia leads to cellular structural changes, notably cell shrinkage.
  • Chronic hypernatremia impacts cellular functions, primarily manifesting as cerebral symptoms and coma.
  • The primary complication is cerebral edema resulting from overly rapid correction of adapted electrolyte imbalances.

Conclusions:

  • Osmolality changes significantly affect cellular stress and require gradual management.
  • In cases of uncertain duration, hypernatremia should be presumed chronic.
  • Careful fluid balance and slow correction are crucial for managing hypernatremia and preventing complications.