hydrostatic pressure

hydrostatic pressure,

the pressure exerted by a liquid.

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pressure,

n a stress or strain that may occur by compression, pull, or thrust; an applied force.

pressure area,

n See area, pressure.

pressure atrophy,

n See atrophy, pressure.

pressure, biting,

n the actual or potential power used in bringing the teeth into contact. See also pressure, occlusal.

pressure, blood,

n See blood pressure.

pressure, deeper,

n a pressure to the body–in excess of that which stimulates Meissner's corpuscles, Merkel's disks, or the hair receptors of light touch–that stimulates the deeper receptors such as Pacini's corpuscles. These latter deep-pressure perception organs lie in the inner layers of the dermis and in the muscle and tendon groups.

pressure, equalization of,

n the act of distributing pressure evenly.

pressure, hand,

n force applied by an instrument held in the hand.

pressure, hydraulic,

n pressure transmitted by a liquid trapped between the tooth and a restoration being cemented.

pressure, hydrostatic,

n the pressure in the circulatory system exerted by the volume of blood when it is confined in a blood vessel. The hydrostatic pressure, coupled with the osmotic pressure within a capillary is opposed by the hydrostatic and osmotic pressure of the surrounding tissues. Fluids flow from the higher pressure areas to the lower pressure areas.

pressure, intrapleural,

n pressure within the pleura.

pressure, occlusal,

n any force exerted on the occlusal surfaces of teeth. See also force, occlusal and load, occlusal.

pressure, osmotic,

n the stress that develops when solutions containing different concentrations of solute in a common solvent are separated by a membrane that is permeable to the solvent but not the solute.

pressure, partial,

n the pressure exerted by each of the constituents of a mixture of gases.

pressure, pulse,

n the difference between systolic and diastolic pressure.

pressure sensibility,

n the ability to detect light touch and deep pressure. See also corpuscle, Meissner's; corpuscle, Merkel's; and corpuscle, Pacini's.

pressure sore,

n a decubitus ulcer caused when the bony protuberances of the body are subjected to chronic pressure from the weight of the body without breaks.

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hydrostatic

pertaining to a liquid in a state of equilibrium or the pressure exerted by a stationary fluid.

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hydrostatic pressure

a significant factor in intestinal absorption; the tissue fluid pressure against which osmosis has to achieve a positive gradient if small molecules are to pass the cell membranes and be absorbed.