Surface fragments on pathogens that cause leukocytes to produce antibodies to destroy them are called __________.
A. antigens
B. lymphocytes
C. endocrines
D. platelets
Answer: A
You might also like to view...
Which theory of dreams is consistent with the idea that dreams help establish neural memory networks?
A. Psychoanalytic theory B. Cognitive value theory C. Activation-synthesis theory D. Behavioral theory
As part of his study, Lincoln asks the participants to complete a questionnaire that assesses attitudes towards drinking as well as personal drinking behavior, yielding scores indicating perceived riskiness of underage drinking, perceived acceptability of underage drinking, and risk of engaging in alcohol abuse. Lincoln's approach is best described as ____
a. enhanced qualitative b. modified quantitative c. duplicative d. mixed methods
In classical conditioning, extinction refers to:
a. the return of a conditioned response that had been extinguished, after a period of nonexposure to the conditioned stimulus b. learning that an event signals the absence or nonoccurrence of the unconditioned stimulus c. a procedure that uses an established conditioned stimulus to condition a response to a second, neutral stimulus d. a loss of responding that results from the repeated presentation of a conditioned stimulus without an unconditioned stimulus
Dr. Iota is concerned about whether or not the final exam in his philosophy class accurately measures a student's accumulated knowledge about core concepts from the course. It appears that Dr. Iota is most concerned with the:
a. reliability of his final exam b. standardization of his final exam c. impact of confounding factors on his final exam d. validity of his final exam