Norepinephrine. Intuitively, it is also called noradrenaline. The neural transmitter acts on noradrenergic receptors. Adrenal glands release the neurotransmitter into the bloodstream and is used in the sympathetic nervous system. The neurotransmitter is significant in the fight-or-flight response to stimuli.
I believe the answer is a Maryland bridge or a resin-bonded bridge.
A maryland bridge also called adhesive bridge is essentially a crown with "wings" on either side, which enables affixing the crown to the adjacent teeth on their posterior side. The advantage of a Maryland bridge is that it is a relatively quick solution, it eliminates the need for surgical procedures and also there is no preparation of the adjacent teeth required. A bonded bridge on the other hand is a resin or porcelain tooth that has resin or metal wings on each side. It is an ideal fix for a missing tooth in the front of the mouth.
The answer that accurately describes the relationship between cancer risk and exposure to mutagens is cancer risk increases when a person is exposed to mutagens because the risk of DNA mutations increases as well.