The procedure is called renal angiography. This procedure is done to check the quality of blood flow to the kidneys, check for blockages, narrowing of the blood vessels and lastly aneurysm. A dye is usually injected into the arteries for easier visualization.
If the bill is counterfeit and the paper is wood-based, the iodine in the pen solution will react with the starch and leave a dark brown or black mark.
Answer: B. Osmosis Across a Membrane
The movement of water across a gradient is called osmosis.
