When a red blood cell is destroyed, a pigment called _______________ is released from the cell. 

Which of the following devices could cause CO2 retention? 1. Simple mask 2. Aerosol face mask 3. Nonrebreathing mask 4. Air-entrainment mask

a. 1 and 3 c. 2 and 3 b. 1 and 2 d. 3 and 4

Rescue breathing should be performed at a rate of one puff per every three seconds for ____.

A. infants B. children C. adults D. the elderly