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Related Concept Videos

Transcellular Transport of Solutes01:23

Transcellular Transport of Solutes

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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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Tonicity in Plants00:53

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Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.
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Tonicity in Plants01:20

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Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
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Inflammatory Response II: Inflammatory Exudate and Tissue Repair01:24

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The immune system's inflammatory response destroys the invading pathogen, permitting the tissue to heal. The changes during the cellular and vascular stages allow exudate formation at the site of inflammation. The inflammatory exudate released from the wound has high protein content and a specific gravity above 1.020.
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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.
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Composition of Body Fluids01:29

Composition of Body Fluids

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Water functions as a solvent accommodating various solutes, which can be categorized under electrolytes and non-electrolytes. Non-electrolytes are usually held together by covalent bonds, restricting them from dissociating in solution, thereby leading to a lack of electrically charged components upon dissolving in water. They are predominantly organic molecules, such as glucose, creatinine, and urea. Electrolytes, on the other hand, are compounds that can break down into ions in water.
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Related Experiment Video

Updated: Mar 5, 2026

In Vivo Tracking of Edema Development and Microvascular Pathology in a Model of Experimental Cerebral Malaria Using Magnetic Resonance Imaging
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Intracellular Edema.

Raja Narayanan, Baruch D Kuppermann

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    |March 29, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Macular edema, a common retinal condition, arises from factors like high metabolic activity and impaired Müller cell function. Therapies targeting Müller cells show promise for treating both intracellular and extracellular edema.

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    Area of Science:

    • Ophthalmology
    • Retinal Biology
    • Cellular Physiology

    Background:

    • The macula is susceptible to edema in diverse retinal diseases, irrespective of the insult's location.
    • Specific anatomical and metabolic features predispose the macula to fluid accumulation.

    Purpose of the Study:

    • To elucidate the factors contributing to macular edema.
    • To explore the role of Müller cells and ion transport in macular edema pathogenesis.
    • To identify potential therapeutic targets for macular edema.

    Main Methods:

    • Review of existing literature on macular edema pathophysiology.
    • Analysis of the role of blood-retinal barrier, ischemia, and Müller cells.
    • Investigation of ion (K+) and aquaporin-4 involvement.

    Main Results:

    • Macular edema is most severe in the outer plexiform layer (Henle's layer).
    • Blood-retinal barrier dysfunction and ischemia disrupt vascular permeability and Müller cell function.
    • Intracellular edema of Müller cells is a significant contributor, alongside extracellular edema.

    Conclusions:

    • Müller cell dysfunction and ion/water transport are critical in macular edema.
    • Current treatments like steroids and anti-VEGF agents address intracellular edema.
    • Developing therapies to enhance Müller cell function offers a promising avenue for new treatments.