Physiological Saline
Physiological Saline - Related Videos
06:29
Salinity-dependent Toxicity Assay of Silver Nanocolloids Using Medaka Eggs
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Cited by 2 •
2016
Embryonic stages are the most susceptible to xenobiotics. Although chemical toxicity depends on salinity, no method exists to test the salinity dependence of toxicity to aquatic organisms. Here, we describe a new and high-throughput method for determining the salinity dependence of toxicity to aquatic embryos.
03:15
A Hypertonic Saline Injection Technique for Inducing Glaucoma in Rats
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2025
This video demonstrates glaucoma induction in an anesthetized rat by injecting hypertonic saline into the episcleral vein. The saline enters the trabecular meshwork via Schlemm's canal, causing tissue scarring, which blocks aqueous humor outflow and raises intraocular pressure. The elevated pressure damages retinal ganglion cells, leading to glaucoma.
01:17
Salinity Tolerance of Alishewanella Species Isolated from Seawall Muddy Water
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2025
Begin with a culture of Alishewanella, a Gram-negative, salt-tolerant bacterium.Next, streak the culture onto agar plates containing increasing concentrations of sodium chloride to simulate varying levels of saline stress.Overlay each plate with a layer of unsolidified medium to prevent oxygen diffusion and maintain the culture in an oxygen-limited environment.Seal and incubate the plates at an optimum temperature to support bacterial growth.During incubation, the bacterium exhibits varying...
05:33
Physiology of the Circulatory System - Concepts
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2019
Homeostasis Conditions in the external environment of an organism can change rapidly and drastically. To survive, organisms must maintain a fairly constant internal environment, which involves continuous regulation of temperature, pH, and other factors. This balanced state is known as homeostasis, which describes the processes by which organisms maintain their optimal internal conditions. To maintain homeostasis, organisms have developed structures with distinct functions. Physiology is the...
04:35
Saline Lavage for Sampling of the Canine Nasal Immune Microenvironment
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2024
Saline nasal lavage can be used to sample the canine nasal immune microenvironment. Because the approach is relatively non-invasive and does not disrupt the nasal tissues, it can be performed serially. Cells and proteins collected from the nasal lavage technique can be processed for various laboratory analyses.
FAQs
Because its dissolved sodium and chloride ions contribute to the solution’s osmotic pressure, physiological saline can establish conditions that approximate body fluids. When the solution is near isotonic, the osmotic conditions limit net water movement through a semipermeable membrane. This makes it useful for examining membrane behavior without introducing a strong imbalance in water movement.
Dissolved ions give physiological saline electrical conductivity, allowing it to serve as an ionic medium in biophysical studies. The same solution therefore supports investigation of electrical behavior alongside osmotic effects. In physics-based biological experiments, conductivity provides a measurable property of the medium while ion-generated osmotic pressure remains relevant to cells and tissues.
Near-isotonic conditions matter because they reduce net water movement across semipermeable cell membranes. That helps preserve the fluid conditions of cells during observation or handling, rather than making membrane water transport the dominant disturbance. For experiments involving diffusion, membrane transport, or fluid balance, controlling this condition improves the usefulness of the saline as a test medium.
It provides a controlled aqueous environment in which researchers can examine osmotic pressure, diffusion, and membrane transport together. Its salt content supplies ions, while its relationship to body-fluid osmotic conditions allows investigators to study how water and dissolved substances behave near biological membranes. This connects measurable physical properties of a solution with processes occurring in cells and tissues.
During laboratory or clinical work, physiological saline can maintain tissue hydration while samples are handled, rinsed, or prepared. The solution’s body-fluid-like osmotic conditions make it suitable when the goal is to keep the sample in a controlled aqueous environment. These uses support preparation and observation without making saline itself the primary experimental subject.
Researchers can examine osmotic pressure, electrical conductivity, net water movement, diffusion, membrane transport, fluid balance, and bioelectric behavior in or around saline-based systems. These observations link the solution’s ionic composition to biological function. In physics or biophysics, the medium helps organize experiments around both transport phenomena and electrical effects.
Observations in physiological saline can show how cells or tissues respond under near-isotonic osmotic conditions, how water movement is limited across semipermeable membranes, and how ionic solutions support conductivity. In sample preparation, the practical outcome is maintained tissue hydration. Together, these results help relate membrane transport and fluid balance to measurable physical properties.