Question

8. Which of the following statements is true?

A. In the secondary response to an antigen, higher levels of IgM will be detected in an individual’s serum.

B. In the secondary response to an antigen, lower levels of IgM will be detected in an individual’s serum.

C. The lag period following secondary exposure to an antigen is longer than the lag period following primary exposure.

D. The lag period following secondary exposure to an antigen is shorter than the lag period following primary exposure.

9. Which of the following is incorrect regarding antibody classes?

A. The Fc region of IgE interacts with eosinophils and is protective against parasites

B. IgM acts as a B-cell receptor when it is membrane bound and forms a pentamer when secreted

C. IgA provides natural passive immunity

D. All antibodies have the same antigen binding specificity when plasma cell class switching occurs

E. All of the above are correct F. none of the above are incorrect

14. Which of the following is true regarding inflammation?

A. Immediately after injury, during acute inflammation, vasodilation occurs to deliver leukocytes to the site

B. Pus is generally produced during inflammation by macrophages

C. Granulomas are pockets of infected tissue that are walled off by WBCs in acute inflammation

D. Bradykinin and histamine are cellular defenses that allow entry of WBCs and fluid into site of infection

15. Which of the following is true regarding artificial immunity?

A. Artificial immunity can only be obtained through vaccination

B. Herd immunity protects only those who can receive a vaccination

C. Live attenuated vaccines are the best because they stimulate the strongest immune response

D. Adjuvants help stimulate a stronger immune response to an antigen

Answer 1

8. Which of the following statements is true?

Answer-

B. In the secondary response to an antigen, lower levels of IgM will be detected in an individual’s serum.

D. The lag period following secondary exposure to an antigen is shorter than the lag period following primary exposure.

When someone encounters antigen for the first time, more of IgM antibodies and compared less of IgG. But when antigen reenters the body more of IgG is produced and less amount of IgM.

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