Peripheral Heart Action (PHA)
Peripheral Heart Action (PHA): A system of training where you go from one exercise to another, with little or no rest, preferably alternating upper body and lower body exercises. Designed for cardiovascular training and t . . . View Full Definition
Play Action: A tactic in which the quarterback fakes either a handoff or a throw in order to draw the defense away from the intended offensive method
Play-Action Pass: A passing play after the quarterback has faked a hand-off.
Pin Action: Motion of struck pins that hopefully will knock down others!
Polymerase Chain Reaction (PCR): A method of amplifying or copying DNA fragments that is faster than cloning. The fragments are combined with DNA polymerase, nucleotides, and other components to form a mixture in which the . . . View Full Definition
Peripheral Vascular Disease: Lack of oxygen supply to the working muscles and tissues of the body, resulting from decreased blood supply.Predominately affects the limbs,the parts of the body furthest away from the heart . . . View Full Definition
Peripheral Component Interconnect (PCI): A local bus standard developed by Intel Corporation. Most modern PCs include a PCI bus in addition to a more general ISA expansion bus. Many analysts, however, believe that PCI will eventual . . . View Full Definition
Peripheral Nervous System: The division of the nervous system that connects the central nervous system to other parts of the body. Components of the nervous system that transmit messages to the central nervous system.
Public Health Assessment (PHA): An ATSDR document that examines hazardous substances, health outcomes, and community concerns at a hazardous waste site to determine whether people could be harmed from coming into contact w . . . View Full Definition
Petrifaction: Mode of fossilization where f organic matter is replaced with silica.
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Chromogenic Materials: Color photographic materials which form dyes during processing.