A preparation of killed or weakened microorganisms, inactivated toxins, or components of microorganisms that is administered to stimulate an immune response is called
A. a vaccine.
B. immunoglobulin.
C. gamma globulin.
D. an antibody.
Answer: A
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In the term infarction, the root infarct means:
A) process. B) necrosis of an area. C) blood. D) tissue.
What effect does marijuana, a psychoactive drug, produce?
A. depressant and psychedelic states B. abnormal physical reflexes C. increased visual and hearing problems D. increased resistance to bacterial and viral infections E. heightened concentration
If you determine that the victim's heart is not beating and other signs of life don't exist, the next step in the basic life support sequence is to:
A) activate the EMS system. B) provide rescue breathing. C) deliver chest compressions. D) open the airway.
Of the following body substances, which one is most radiolucent?
A. Fat B. Air C. Water D. Bone E. Muscle