MRI vs. MRA. An MRA, or magnetic resonance angiogram, is a type of MRI scan that uses MRI's magnetic fields and radio waves to produce pictures of blood vessels inside the body, allowing doctors to locate problems that may cause reduced blood flow.
Best Answer: Ethyl alcohol, at the concentrations used in most antibacterial preparations, kills bacteria by disrupting membranes and by denaturing proteins. Ethylalcohol is miscible in water (that is, completely soluble). But ethyl alcohol can also dissolve in the membranes of cells.
(Note: Ethyl alcohol is very different from rubbing alcohol, methyl alcohol, which is poisonous if taken internally). Although ethanol is a CNS depressant, at lower doses it has a stimulating effect which is due to a lessening of inhibitions rather than due to true physical stimulation. As the dose is increased, there is progressive depression of cerebral function.