Category: E
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Evaporation
Loss of body heat through the sweating mechanism. The evaporation of sweat from the skin cools the body. A change in a compound from a liquid state to a vapor form, condensation reaction. The phenomenon under consideration here is the dissipation of thermal energy, wherein aqueous H2O undergoes a phase transition from the liquid state…
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Essential amino acids
An amino acid that cannot be synthesized by the body and thus must be supplied in the diet. The eight amino acids that the body cannot manufacture in sufficient amounts to meet physiologic need. Those amino acids that cannot be synthesized by humans and most other vertebrates, and therefore must be obtained from the diet.…
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Epiphyseal plates
Cartilaginous growth plates located at the ends of bones, in particular long bones. The disc of cartilage between the shaft and the epiphysis of a long bone during its growth. The thin layer of cartilage between the epiphysis and the shaft of a bone. Growth in length of the bone occurs at this layer. The…
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Energy metabolism
The chemical reactions involved in energy transformations within cells. The various reactions involved in the oxidation of metabolic fuels (mainly carbohydrates, fats, and proteins), to provide energy (linked to the formation of ATP (adenosine triphosphate) from ADP (adenosine diphosphate) and phosphate ions).
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Endocrine system
The system of glands that produce and release signaling molecules known as hormones. The system of endocrine glands (pituitary, thyroid, parathyroid, and adrenal) that produces the body’s hormones. The group of glands that manufacture and secrete hormones directly into the bloodstream. A system of related ductless glands. The set of glands that produce many of…
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Employee
A person who is hired to provide services to a company on a regular basis in exchange for compensation and who does not provide these services as part of an independent business. A person who works for and is paid by another (the employer), and who is under the control of the employer. An employee…
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Emergency medical services (EMS)
Accessed by dialing 911 or appropriate number for a specific geographic area. Trained services provided on the scene. A broad term covering all services required to care for patients in emergencies, at the sites of the emergencies, in transit, and at emergency facilities. It includes emergency medical treatment; transportation arrangements; communication among vehicles, personnel, and…
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Emergency action plan (EAP)
A preconceived plan of action for emergency situations. Its purpose is to ensure that first aid is administered in an expedient and coordinated manner.
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Embolism
A sudden obstruction of a blood vessel, usually caused by a clot carried in the blood stream. Blockage of a blood vessel caused by a foreign object (embolus) such as a quantity of air or gas, a piece of tissue or tumour, a blood clot (thrombus), or fatty tissue derived from atheroma, in the circulation.…
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Ellipsoidal or condyloid joint
This joint is formed by an oval convex surface placed near an elliptical concave surface. Example: radiocarpal (wrist) joint.