Gasses that displace oxygen, such as carbon dioxide and nitrogen, are examples of _____ asphyxiants.

While planning for your response after a tsunami, you should primarily prepare to treat patients who:

A) are in cardiopulmonary arrest secondary to drowning. B) were injured after being struck by or entangled in debris. C) have medical conditions that were exacerbated by trauma. D) have massive sepsis due to contaminants found in the water.

Which facial muscle raises the eyebrows?

A. Frontalis B. Zygomaticus C. Platysma D. Masseter