All of the following are enzymes that break down periodontal tissues except one. Which one is the exception?

Alcohol and alcohol-based prep solutions are volatile and flammable. When alcohol solution or volatile fumes come in contact with heat sources, they can easily cause

A. allergies C. fire B. chemical burn D. thermal burn

Primitive, involuntary ventilation control occurs in the medullary respiratory center of the ____ with major nerve input from the vagus nerve.

A. pons B. pineal gland C. medulla oblongata D. thymus