action /ac·tion/ (ak´shun) the accomplishment of an effect, whether mechanical or chemical, or the effect so produced.
cumulative action,
action [ak´shun]
ball-valve action the intermittent obstruction caused by a free or partially attached foreign body in a tubular or cavitary structure, as by a foreign body in a bronchus, a stone in a bile duct, or a tumor in the cardiac atrium. 
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Ball-valve action. Calculi obstructing the cystic duct (A), common hepatic duct (B), and common bile duct (C) .
cumulative action action of increased intensity, as the sudden and markedly increased action of a drug after administration of several doses, due to the accumulation of the drug in the body.
reflex action a response, often involuntary, resulting from passage of excitation potential from a receptor to a muscle or gland over a reflex arc.
cumulative action,
1 the increased activity of a therapeutic measure or agent when administered repeatedly, as the cumulative action of a regular exercise program.
2 the increased activity demonstrated by a drug when repeated doses accumulate in the body and exert a greater biologic effect than the initial dose.
action [ak´shun]
the accomplishment of an effect, whether mechanical or chemical, or the effect so produced.
cumulative action the sudden and markedly increased action of a drug after administration of several doses.
independent nursing action nursing care that can be provided without the direction of other health care providers.
medication action/side effects in the omaha system, information regarding the purposes and positive or negative consequences of therapeutic drugs.
reflex action an involuntary response to a stimulus conveyed to the nervous system and reflected to the periphery, passing below the level of consciousness; see also reflex.
action
1. the accomplishment of an effect, whether mechanical or chemical, or the effect so produced.
2. the gait or type of movement of an animal.
cumulative action
the sudden and markedly increased action of a drug after administration of several doses.
action lists
are produced by a computerized herd health program from the analysis of reproduction data, which set out which cows are to be examined for a variety of reproductive reasons, such as pregnancy, failure to conceive and postnatal clearance for resumption of breeding.
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