Category: O

Alternate forms of the same substance which differ only in terms of the arrangement of molecules.  

The theory that asserts that the nervous system has the tendency to counteract any deviation from the neutral point of the pain-pleasure dimension. When the original stimulus is maintained, there is an attenuation of the emotional state that a person is in. When the stimulus is withdrawn, the opponent process reveals itself and the emotional…

The theory of color vision that asserts that there are three pairs of color antagonists: red-green, blue-yellow, and white-black. Stimulation of one member of a pair inhibits the other member of the pair.  

A milky exudate of the unripe seed pod of the opium poppy, Papaver somniferum. A substance made from poppies which is used in the preparation of codeine and heroin. Substance derived from poppy plants (Papaver species) that contains morphine, codeine, papaverine, and other narcotic substances used to relieve pain. An extract from the poppy Papaver…

A convulsive rigid arching of the back that is characteristically seen in severe meningitis. Opisthotonus is a type of spasm where the head tilts backward and the back arches. It can manifest in individuals with conditions like tetanus or meningitis, or following a significant brain injury.  

The medical study of the structure, function, and diseases of the eye. The study of the eye and its diseases. Study of tire eye, its development, structure, functions, defects, diseases, and treatment. The branch of medical science that studies the structure, function, and diseases of the eye. A physician who specializes in ophthalmology is an…

A physician who specializes in the diagnosis and treatment of diseases and disorders of the eyes. A physician specializing in the diagnosis and treatment of all eye diseases and abnormal conditions including refractive errors. They may prescribe drugs and lenses, and perform surgery or other treatment. Ophthalmologists represented about 12 percent of all surgical specialists…

An infection of the eye by the gonococcal bacterium of a newborn infant. Conjunctivitis of a newborn baby, beginning 21 days after birth, caused by infection in the birth canal. Ophthalmia neonatorum is an eye inflammation in newborns, often accompanied by a discharge. It typically arises from exposure to gonorrhea or chlamydia during birth. Antibiotic…

A gene that is part of an operon that controls the activity of one or more structural genes. Segment of deoxyribonucleic acid, DNA (the hereditary material) that regulates the transcription of structural genes in its operon and acts with a regulatory gene to control the activity of structural genes.  

One’s feelings of right or wrong that influence one’s decisions.