chap 11

• absolute pressure the sum of gauge pressure and atmospheric pressure
• adhesive forces the attractive forces between molecules of different types
• Archimedes’ principle the buoyant force on an object equals the weight of the fluid it displaces
• buoyant force the net upward force on any object in any fluid
• capillary action the tendency of a fluid to be raised or lowered in a narrow tube
• cohesive forces the attractive forces between molecules of the same type
• contact angle the angle between the tangent to the liquid surface and the surface
• density the mass per unit volume of a substance or object
• diastolic pressure minimum arterial blood pressure; indicator for the fluid balance
• diastolic pressure the minimum blood pressure in the artery
• fluids liquids and gases; a fluid is a state of matter that yields to shearing forces
• gauge pressure the pressure relative to atmospheric
• glaucoma condition caused by the buildup of fluid pressure in the eye
• intraocular pressure fluid pressure in the eye
• micturition reflex stimulates the feeling of needing to urinate, triggered by bladder pressure
• Pascal’s Principle a change in pressure applied to an enclosed fluid is transmitted undiminished to all portions of the fluid and to the walls of its container
• pressure the force per unit area perpendicular to the force, over which the force acts
• pressure the weight of the fluid divided by the area supporting it
• specific gravity the ratio of the density of an object to a fluid (usually water)
• surface tension the cohesive forces between molecules which cause the surface of a liquid to contract to the smallest possible surface area
• systolic pressure maximum arterial blood pressure; indicator for the blood flow
• systolic pressure the maximum blood pressure in the artery