DAVID MCCARTHY / SCIENCE PHOTO LIBRARY DAVID MCCARTHY / SCIENCE PHOTO LIBRARY
Bronchodilator drug crystals, coloured scanning electron micrograph (SEM). These are crystals of the drug ventolin (salbutamol sulphate), a bronchodilator drug used to treat asthma. Asthma is a condition that causes narrowing of tiny airways in the lungs, which become inflamed and lead to attacks of wheezing and breathlessness. Salbutamol sulphate works by stimulating the beta 2 receptors in the lung, causing the muscles in the airways to relax and allowing the airways to open.
Model release not required. Property release not required.