The physiological process by which toxicants pass body membranes and enter the bloodstream or other body components from the site of exposure.
Air changes per hour. One ACH means a volume of outdoor air equal to the volume of the space being ventilated has entered that space in one hour.
A condition involving relatively brief periods of time. For CO exposure, acute is defined as an exposure of up to 10-15 hrs or less, involving one major exposure.
A biological response to exposure to multiple chemicals which is equal to the sum of the effects of the individual agents.
An IAQ control strategy to remove various airborne particles and/or gases before the air enters the occupied space. The three types of air cleaning most commonly used are particulate filtration, electrostatic precipitation, and gas absorption.
Used in two ways. First, the number of times that the outdoor air replaces the volume of air in a building per unit time, typically expressed in air changes per hour; second, the number of times that the ventilation system replaces the air within a room or area within the building.
Inability to initiate changes in activity and to perform ordinary volitional movements rapidly and easily. It is the most disabling feature of Parkinson's disease.
A substance capable of causing an allergic reaction because of an individual's sensitivity to that substance.
(plural = alveoli) A small microscopic sac that is the functional unit of the lung, the location at the far end of the respiratory tract where gas exchange occurs.
A unicellular organism which may either obtain energy by means of photosynthesis or by ingesting other organic material. The organism has no wall or coat outside its cell membrane; it moves and feeds by means of pseudopodia.
Coordinates autonomic and endocrine responses in conjunction with emotional states; part of the limbic system.
A disease marked by brief, sudden attacks of chest pain precipitated by a deficient supply of oxygen to the heart muscles (also known as angina of the chest or angina pectoris).
A biological response to exposure to a single chemical interfering with the action of another or to multiple chemicals interfering with each other's actions.
Inability to perform complex acts requiring sequences of muscle contractions or a planned strategy.
The ability of a filter to remove injected standard dust from the test air. It is calculated as a % relationship on a weight basis.
Substances that starve the cells of an individual from the life-giving oxygen needed to sustain metabolism.
Quick arrhythmic movements that occur due to brief interruptions in background tonic muscular contractions.
Inability to sustain muscles of the fingers, toes, tongue or any other group of muscles in one position; maintained posture is interrupted by continuous slow, purposeless movements.
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