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Microbiology › ViewAn example of natural active immunity would be
A. chickenpox infection, followed by lifelong immunity.
B. giving a person immune serum globulins to chickenpox virus after exposure to the disease.
C. a fetus acquiring maternal IgG to the chickenpox virus across the placenta.
D. chickenpox vaccine triggering extended immunity to chickenpox.
Immunology › View
Which of the following best describes the differences between the classic and alternate complement pathways?
A. The classic pathway results in the lysis of the target cell, which is not the case with the alternate pathway.
B. The alternate pathway requires antibody for initiation, and the classic pathway is antibody-independent.
C. The classic pathway is more active than the alternate pathway.
D. The alternate pathway typically requires C3b for activation, while the classical pathway typically requires antigen-antibody complexes.