The Biological Effects of Nitric Oxide and Disease

Nitric oxide is the normal small molecule material exsting in human body,which has a very wide range of biological effects.Its physiological functions include three main areas:diastolic blood vessels role;the transmission molecules of information of the central and peripheral nervous system;the immune response elements with the resistant effects of pathogenic microorganisms infection and anti-tumor.Because of its very wide range of biological effects,it is closely related with a number of human body organs and system diseases. Key words: Nitric oxide; Biological effects; Diseases