Cation - -Ions that carry a positive charge
Edema - -Swelling caused by excess fluid trapped in body tissues
Dehydration - -Condition that occurs when a body does not take in as much water as it
loses or lacks sufficient reserves to maintain proper body function
Hydrostatic Pressure - -Pressure a fluid exerts within a closed system on the walls of its
container
Osmotic Pressure - -Power of a solution to draw water across a semipermeable
membrane
Osmosis - -Movement of water across cell membranes, from the less concentrated
solution to the more concentrated solution
Hematocrit - -Measures the volume (%) of whole blood that is composed of RBC's
Colloid Osmotic Pressure - -Pulling force exerted by colloids that helps maintain the water
content of blood by pulling water from the interstitial space into the vascular compartment
Anion - -Ions that carry a negative charge
Colloid - -Substance such as large protein molecules that do not readily dissolve into true
solutions
, Extracellular Fluid - -Found outside the cells and accounts for about 1/3 of total body
fluids
Interstitial Fluid - -Accounts for approximately 75% of extracellular fluid. Surrounds the
cells
Intravascular Fluid - -Accounts for approximately 20% of the extracellular fluid and is
found within the vascular system. Also called plasma
Solutes - -Substances that dissolve in liquid
Intracellular Fluid - -Fluid found within the body cells that contains solutes vital to the
metabolic processes of cells
Solvent - -Component of a solution that can dissolve a solute
Tonicity - -May be used to refer to the osmolarity of a solution
Isotonic - -Solution that has the same osmolality as body fluids.
Hypertonic - -Have a higher osmolality than body fluids
Hypotonic - -Have a lower osmolality than body fluids
Factors that can impact fluid intake - --Decreased thirst sensation