Question

1. what is the main characteristic that distinguishes specific immunity from nonspecific immunity?

a) it responds to all pathogens the same way
b) it targets a broad group of antigens
c) it has memory and specificity
d) it causes inflammation

1. which of the following immunoglobulins is the most abundant in circulation and provides long - term immunity?

a) igm
b) iga
c) ige
d) igg

1. which class of antibodies is the first to appear after exposure to an antigen?

a) igg
b) iga
c) igm
d) ige

1. what is the function of plasma cells in immunity?

a) kill infected cells
b) present antigens to t cells
c) produce antibodies
d) activate complement proteins

Explanation:

1. Specific immunity (adaptive immunity) has memory (remembers previous pathogens) and specificity (targets specific antigens). Nonspecific immunity (innate immunity) is more general.
2. IgG is the most abundant immunoglobulin in circulation and provides long - term immunity.
3. IgM is the first antibody to appear after antigen exposure.
4. Plasma cells are derived from B cells and their main function is to produce antibodies.

Answer:

1. C. It has memory and specificity
2. D. IgG
3. C. IgM
4. C. Produce antibodies