it acts a constrictor decreasing the diamater of an artery and increasing blood pressure
constrict
Epinephrine is a vasoconstrictor
alcohol is a vasodilator at lower doses but at higher doses it acts as a vasocontrictor. (1) caffeine is a vasoconstrictor. hence the help you receive from drinking coffee with aspirin after getting a headache related to drinking alcohol. (1) - http://www.scientificamerican.com/article.cfm?id=what-are-the-effects-of-a As a general guideline, most stimulants will act as vasoconstrictors and most depressants will act as vasodilators. There are obvious exceptions to this rule (such as NO2)
yes
Indeed.
Not quite sure, but the Maloney dilator is handed down the esophagus by the anesthetist who is not sterile.
Caffeine is a vasoconstrictor, so it will actually help shrink your hemorrhoids. This can be a great way to help cure your hemorrhoid problem, but it could make it worse if you aren't aware of the side-effects. Caffeine can also cause small dry stools, which could likely make the problem worse. However, you can resolve this by drinking lots of water and eating lots of fiber. Stool softeners can also help a lot.
it is a broncho dilator ^^
common bile duct
Serotonin
vasoconstrictor
A dilator is a medical device used to gently stretch or widen a body opening or cavity. It is commonly used in medical procedures to help with tissue expansion or to treat conditions that cause narrowing or scarring of the body's passageways. Dilators come in various shapes and sizes depending on the specific medical need.
Serotonin