PPD (purified protein derivative) or tuberculin is injected intradermally to test whether an individual is infected with tuberculosis. After 48-72 hours post-injection, the test is read by measuring:
A. The distance the bleb or wheal forms from the injection site
B. The diameter of the bleb or wheal
C. The number of blebs or wheals at the injection site
D. The intensity of the red coloration of the injection site
Answer: B. The diameter of the bleb or wheal
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Microbiology
- Select the correct statement about active and passive immunity.
- Select the correct definition about tissue grafts.
- Natural killer (NK) cells ________.
- Clonal selection of B cells ________.
- Fever ________.
- What is the role of interferon in defense against disease?
- Which of the following is not a function of the inflammatory response?
- Which of the following does not respond to cell-mediated immunity?
- Which statement is true about T cells?
- Which of the following is not a first line of defense?
- Innate immune system defenses include ________.
- B cells respond to the initial antigen challenge by ________.
- Which of the following is not a method by which antibodies work?
- Which of the following is associated with passive immunity?
- Which of the following is not a type of T cell?
- The antibody molecule is held together by ________ bonds.
- The primary immune response ________.
- Which of the following statements about Complement is false?
- Which of the following is a part of the second line of defense against microorganisms?
- Select the correct statement about the function of antibodies.
- Cytotoxic T (TC) cells are like natural killer (NK) cells because they both
- Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by ________.
- Antibody functions include all of the following except ________.
- Phagocyte mobilization involves ________.
- Which of the following is not an autoimmune disease?
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.