Pet therapy brings pleasure to severely impaired residents.

A 3-year-old female presents to her pediatrician due to severe, recurrent Staphylococcus aureus abscesses. She demonstrates an absence of pigment in her hair, skin, and eyes. Her infections are possibly due to

A) the inability of the white blood cells to adhere to the blood vessels. B) a deficiency of killing enzymes in the white blood cells. C) abnormal granules in the white blood cells. D) a defect in the complement cascade.

What is the purpose of the demand-valve resuscitator?

a. It senses whether a person is breathing on her own and sends a warning signal to start CPR when breathing has ceased. b. It regulates the pressure of the oxygen being released from the tank. c. It forces oxygen into the lungs of a person who is not breathing. d. It synchronizes with the flowmeter and adjusts the ratio of oxygen to carbon dioxide depending on the needs of the patient.