Immunology (Serology) Medical Laboratory Final Exam Possible Questions And Answers 100% Accurately Solved.

From the following, identify a specific component of the adaptive immune system that is formed in response to antigenic stimulation: A. lysozyme B. complement C. commensal organisms D. immunoglobulin - correct answer D. Immunoglobulin Which region of the immunoglobulin molecule can bind to an antigen? A. Fab B. Fc C.C1 D.CH - correct answer A. Fab Which immunoglobulin appears in the highest titer in the secondary response? A. IgG B. IgM C. IgA - correct answer A. IgG Which immunoglobulin can cross the placenta first in the primary immune system? A. IgG B. IgM C .IgA D. IgE - correct answer A. IgG Which immunoglobulin cannot cross the placenta first in the primary immune system? A.IgG B.IgM C.IgA D.IgE - correct answer B. IgM Which immunoglobulin is transferred to the fetus by the mother. A.IgG B.IgM C.IgA D.IgE - correct answer B. IgG What type of B cells are formed after antigen stimulation? A. Receptor Activated B cells B. Antigen Dependent B cells C. Mature B Cells D. Plasma cells and memory B cells - correct answer D. Plasma cells and memory B cells What is the name of the process by which phagocytic cells are attracted toward a substance such as a bacterial peptide? A. Diapedesis B. Chemotaxis C. Phagocytosis D. Degranulation - correct answer B. Chemotaxis what has happened in a tubes numbered 5 - 7 show stronqer reaction than tube in 1 - 4? A. Post-zone Reaction B. Prozone Reaction C. Hypoparathyrhodism D. Diabetic Ketoacidosis - correct answer B. Prozone reaction The directions for a slide agglutination test instruct that after mixing the patient's serum and latex particles the slide must be rotated for 2 minutes. What would happen if the slide were rotated for 10 minutes? A. Possible false-Negative result B. False Negative C. Possible false-positive result D. False Positive - correct answer C. Possible false-positive result Which serum antibody response usually characterizes the primary (early) stage of syphilis? A. Detected 1-3 weeks after appearance of the primary chancre B. Detected 4-6 weeks after appearance of the primary chancre C. Detected 8 weeks after appearance of the primary chancre D. Detected 12 weeks after appearance of the primary chancre - correct answer A. Detected 1-3 weeks after appearance of the primary chancre Which specimen is the sample of choice to evaluate latent or tertiary syphilis? A. Blood B. CSF C. Urine D. Plasma - correct answer B. CSF Which tests are considered confirmatory test for HIV? A. Western Blot B. Elisa C. Rapid Antibody tests D. None of the choices are correct - correct answer A. Western blot Which tests are considered screening tests for HIV? A. Western Blot B. Elisa 4th generation C. Rapid Antibody tests D. Both B & C are correct - correct answer D Tests to identify infection with HIV fall into which three general classification types of tests? A. Antigens B. Antibodies C. Nucleic acid D. All answers chooses are correct - correct answer D Which T helper to T suppressor ratio is most likely in a patient with acquired immunodeficiency syndrome (AIDS)? A. 1:2 B. 1:4 C. 1:8 D. 1:16 - correct answer A. 1:2 All of the following hepatitis viruses are spread through blood or blood products except? A.Hepatitis A B.Hepatitis B C.Hepatitis C D. Hepatitis D - correct answer A. Hepatitis A Which of the following statements regardinginfection with hepatitis D virus is true? A.Occurs in patients with hepatitis B B.Occurs in patients with hepatitis A C.Occurs in patients with hepatitis C D. Occurs in patients with hepatitis E - correct answer A. Occurs in patients with hepatitis B This is type of ANA staining is seen with antibodies to ribonucleoprotein? (Fill in the Blank) - correct answer Speckled The sum of the binding of all the paratopes and the epitopes. A. Avidity B. Affinity - correct answer A. Avidity Antibody bound to an antigen indicates which pathway? A. Classical B.Alternative C.Lectin D. None of the above - correct answer A. Classical What is the most likely explanation when a patient has clinical signs of viral hepatitis but tests negative for hepatitis A IgM, hepatitis B surface antigen, and hepatitis C Ab? A. Tests were performed improperly B. The patient does not have hepatitis C. The patient may be in the "core window" D. Clinical evaluation was performed improperly - correct answer C. The patient may be in the "core window" Which hepatitis B marker is the best indicator of early acute infection? A. Anti-Hbs B. HbeAg C. Anti-HBc D. HbsAg - correct answer D. HbsAg