(NO) A gas that is produced both outside the body as a pollutant (for example, in car exhaust fumes), and inside the body, where it takes the form of a molecule that acts as a messenger between cells.
Nitric oxide causes blood vessels to dilate, affecting the flow of oxygenated blood and regulating blood pressure.
Overproduction of nitric oxide is associated with various disorders, including toxic shock, rheumatoid arthritis, and diabetes mellitus; underproduction may cause impotence and angina.
The control of nitric oxide is an important element of many drug treatments.
an important member of the group of gaseous mediators, which – together with amine mediators (e.g. adrenaline, noradrenaline, histamine, acetylcholine) and lipid mediators (e.g. prostaglandins) – produce many physiological responses (e.g. smooth muscle relaxation). Nitric oxide is involved in the manifestations of sepsis and septic shock. Formula: NO.
An ingredient of many skin preparations that has a mild astringent action and a soothing effect. Zinc oxide is used to treat painful, itchy, or moist skin conditions and to ease the pain caused by haemorrhoids and insect bites or stings. It also blocks the ultraviolet rays of the sun (see sunscreens).... zinc oxide
A naturally occurring chemical that performs a wide range of biological roles. It is involved in the laying down of memories in the BRAIN; in killing viruses, bacteria and cancer cells; and in helping to control blood pressure. NO, comprising a nitrogen atom attached to an oxygen one, is one of the smallest of biologically active compounds as well as having such diverse functions. The chemical is a muscle relaxant and is important in maintaining the heart and circulation in good condition. NO is also the toxic agent released by macrophages (see MACROPHAGE) to kill invading germs and spreading cancer cells. It acts as an essential NEUROTRANSMITTER and protects nerve cells against stress. Researchers are studying how it might be used to treat diseases, for example by using it as an inhaled gas in certain respiratory conditions.... nitric oxide (no)
Also known as laughing gas, this is (at ordinary pressures) a colourless, sweetish-smelling gas. It is used with oxygen to provide relief of pain (see ANALGESICS; PAIN) and mild ANAESTHESIA during childbirth, during painful dental procedures, and at the site of major accidents. It has a rapid action and the effects do not last for long.... nitrous oxide gas
a strong corrosive mineral acid, HNO3, the concentrated form of which is capable of producing severe burns of the skin. Swallowing the acid leads to intense burning pain and ulceration of the mouth and throat. Treatment is by immediate administration of alkaline solutions, followed by milk or olive oil.... nitric acid
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