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Tonicity. In chemical biology, tonicity is a measure of the effective osmotic pressure gradient; the water potential of two solutions separated by a partially-permeable cell membrane. Tonicity depends on the relative concentration of selective membrane-impermeable solutes across a cell membrane which determine the direction and extent of ...
Saline solution for irrigation. Normal saline (NSS, NS or N/S) is the commonly used phrase for a solution of 0.90% w/v of NaCl, 308 mOsm/L or 9.0 g per liter. Less commonly, this solution is referred to as physiological saline or isotonic saline (because it is approximately isotonic to blood serum, which makes it a physiologically normal solution).
Hypoosmolar hyponatremia is a condition where hyponatremia is associated with a low plasma osmolality. [ 1] The term " hypotonic hyponatremia " is also sometimes used. [ 2] When the plasma osmolarity is low, the extracellular fluid volume status may be in one of three states: low volume, normal volume, or high volume.
Turgor pressure is the force within the cell that pushes the plasma membrane against the cell wall. [ 1] It is also called hydrostatic pressure, and is defined as the pressure in a fluid measured at a certain point within itself when at equilibrium. [ 2] Generally, turgor pressure is caused by the osmotic flow of water and occurs in plants ...
Physical water scarcity, heatwaves, disease (most commonly from diseases that cause vomiting and/or diarrhea ), exercise. Treatment. Drinking clean water. Medication. Saline. In physiology, dehydration is a lack of total body water, [ 3] with an accompanying disruption of metabolic processes.
In hypotonic solutions, water flows into the cell and the cell swells ( turgescence ). Osmotic shock or osmotic stress is physiologic dysfunction caused by a sudden change in the solute concentration around a cell, which causes a rapid change in the movement of water across its cell membrane. Under hypertonic conditions - conditions of high ...
Hyponatremia. Hyponatremia or hyponatraemia is a low concentration of sodium in the blood. [ 4] It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L ), with severe hyponatremia being below 120 mEq/L. [ 3][ 8] Symptoms can be absent, mild or severe. [ 2][ 9] Mild symptoms include a decreased ability to think ...
Isotonic solutions have the same salt concentration as the human body, whereas hypertonic solutions have a higher salt content and hypotonic solutions have a lower salt content. Isotonic saline nasal sprays are commonly used in infants and children to wash out the thick mucus from the nose in case of allergic rhinitis. Hypertonic solutions may ...