The special type of leukocyte that is responsible for recognizing foreign antigens, producing antibodies, and developing memory is the:

There are predisposing factors that create a tendency toward or susceptibility to becoming stressed. These include all of the following EXCEPT _______

a. attitudes and feelings b. health habits c. economic and social resources d. gender

Oximetry is the measurement of blood hemoglobin saturations using what technique?

a. Electrochemical dissociation b. Photoplethysmography c. Photochemical reactions d. Spectrophotometry