Category: O

One of a group of enzymes that catalyze oxidation-reduction reactions. This class includes the enzymes formerly known either as dehydrogenases or as oxidases.  

A local anesthetic of skin and mucous membranes, used in indigestion mixtures to relieve heartburn and pain due to inflammation of the digestive system. Mild side-effects, including dry mouth and nausea, may occur.  

The presence in the urine of oxalic acid or oxalates, especisdly calcium oxalate. Excessive amounts of oxalates are excreted in oxalosis. The presence in the urine of oxalic acid or oxalates, in particular calcium oxalate. A benzodiazpine anxiolytic drug. Used for short-term relief of severe anxiety, including panic attacks. Like all benzodiazepines, oxazepam should be…

An inborn defect of metabolism causing deposition of oxalate in the kidneys and elsewhere and eventually leading to renal failure. An inherited defect in the body’s metabolism in which oxalates a product of metabolism are deposited in the kidneys and other tissues, ultimately causing failure of the kidneys.  

The pinna and the external auditory meatus of the ear.  

A drug that stimulates the heart and is used to treat heart failure and other heart conditions. It is administered by mouth or injection and has the same actions and side-effects as digitalis.  

One of the small particles of calcium carbonate associated with a macula in the saccule or utricle of the inner ear. Microscopic crystals of calcium carbonate on the hair cells of the maculae of the utricle and saccule of the middle ear. These are important in sensing the orientation to gravity. A calcified deposit developed…

A small cavity in the mesoderm of the head of an embryo that later develops into the membranous labyrinth of the ear. An embryonic chamber from which the membranous labyrinth arises.  

The cup-shaped cartilage in the head of an embryo that later develops into the bony labyrinth of the ear. The cartilaginous capsule that develops in the embryonic skull to enclose the ear.  

A colorless or faintly yellowish compound used to stain fats or as a fixative in the preparation of tissues for microscopical study. Osmium tetroxide evaporates readily, the vapor having a toxic action on the eyes, skin, and respiratory tract.