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Cards In This Set
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Fluid
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A substance composed of molecules that move past one another freely. fluids are characterized by their ability to conform to the shape of whatever container holds them
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Intracellular fluid
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The fluid held at any given time within the walls of the body's cells
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Estracellular fluid
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The fluid outside the body's cells, either in the body's tissues; as the liquid portion of blood, called plasma; or as digestive juices
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Electrolyte
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A substance that disassociates in solution into positively and negatively charged ions and is thus capable of carrying an electrical current
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Ion
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Any electrically charged particle, either positively or negatively charged
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Solvent
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A substance that is capable of mixing with and breaking apart a variety of compounds. Water is an excellent solvent
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Blood volume
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The amount of fluid in blood
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Thirst mechanism
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A cluster of nerve cells in the hypothalamus that stimulate our conscious desire to drink fluids in response to an increase in the concentration of salt in our blood or a decrease in blood pressure and blood volume
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Metabolic water
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The water formed as a byproduct of our body's metabolic reactions
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Insensible water loss
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The loss of water from the skin in the form of sweat and from the lungs during breathing
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Diuretic
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A substance that increases fluid loss via the urine. Common diuretics include coffee, tea, cola, and other caffeine-containing beverages, as well as prescription medications for high blood pressure and other disorders
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Hypernatremia
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A condition in which blood sodium levels are dangerously high
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Hyponatremia
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A condition in which blood sodium levels are dangerously low
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Hyperkalemia
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A condition in which blood potassium levels are dangerously high
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Kypokalemia
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A condition in which blood potassium levels are dangerously low
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