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.
ELI5: Rubbing alcohol (isopropanol) has an extra carbon. You metabolize (digest) it differently than drinking alcohol (ethanol). That's why you can drink one but not the other. Other answers here are (more) correct, but this is the most ELI5 answer.