04:02The Humoral Immune Response - Immunology AnimationsDr.G Bhanu Prakash Animated Medical Videos1171views
06:57Immunoglobulins Structure and Function / Antibody Structure Types and FunctionMEDSimplified857views
Textbook QuestionMultiple Choice More than one choice may apply. Which of the following antibody capabilities causes a transfusion reaction with A or B erythrocyte antigens? a. Neutralization b. Precipitation c. Complement fixation d. Agglutination290views1rank
Multiple ChoiceWhich of the following statements is characteristic of a secondary humoral response?987views
Textbook QuestionWhich of the following is not involved in the activation of a B cell? a. antigen, b. helper T cell, c. cytokine, d. cytotoxic T cell.329views1rank
Textbook QuestionTerrence has severe asthma and allergies, and is placed on a medication that blocks the functioning of IgE. How would this medication alleviate his symptoms?248views
Textbook QuestionTed finds out that he has been exposed to measles. He is concerned that he might have contracted the disease, so he goes to see his physician. The physician takes a blood sample and sends it to a lab for antibody levels and titers. The results show an elevated level and activity of IgM antibodies to rubella (measles) virus but very few IgG antibodies to the virus. Has Ted contracted the disease?252views
Textbook QuestionMultiple Choice More than one choice may apply. Which of these antibody classes is usually arranged as a pentamer? a. IgG b. IgM c IgA d. IgD249views
Textbook QuestionBinding of antigens to receptors of immunocompetent lymphocytes leads to clonal selection. Describe the process of clonal selection. What nonlymphocyte cell is a central actor in this process, and what is its function?298views1rank
Textbook QuestionDefine antibody. Using an appropriately labeled diagram, describe the structure of an antibody monomer. Indicate and label variable and constant regions, heavy and light chains.240views
Textbook QuestionMatch the following antibodies with the correct definition. ____IgD ____IgM ____IgG ____IgA ____IgEa. Antibody found in secretionsb. Most common antibody; crosses the placentac. Antibody involved in allergies and parasitic infectionsd. Pentamer and potent agglutinating agente. Antibody bound to the B cell plasma membrane211views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct is to make a true statement.d. Vaccinations are given to induce the production of the inflammatory response.230views
Textbook QuestionName the five classes of immunoglobulins. Which is most likely to be found attached to a B cell membrane? Which is most abundant in plasma? Which is important in allergic responses? Which is the first Ig to be released during the primary response? Which can cross the placental barrier?335views
Textbook QuestionHow does the formation of an antigen–antibody complex cause the elimination of an antigen?235views
Textbook QuestionName the five antibody classes and describe where each is most likely to be found in the body.269views1rank
Textbook QuestionDifferentiate between a primary and a secondary immune response. Which is more rapid and why?287views
Textbook QuestionAntibodies released by plasma cells are involved in a. humoral immunity, b. immediate hypersensitivity reactions, c. autoimmune disorders, d. all of the above.309views1rank
Textbook QuestionAn investigator at a crime scene discovers some body fluid on the victim's clothing. The investigator carefully takes a sample and sends it to the crime lab for analysis. On the basis of the analysis of antibodies, could the crime lab determine whether the sample is blood plasma or semen? Explain.283views
Multiple ChoiceWhich immune cell is able to respond quickly after any subsequent encounter with the same antigen?1003views
Textbook QuestionAn anesthesia technician is advised that she should be vaccinated against hepatitis B, which is caused by a virus. She is given one injection and is told to come back for a second injection in a month and a third injection after 6 months. Why is this series of injections necessary?246views
Textbook QuestionWhich of the following is not a role of TH cells?a. Stimulation of macrophagesb. Activation of naïve TC cellsc. Stimulation of naïve B cellsd. Stimulation of clonal selection218views
Textbook QuestionMark the following statements as true or false. If a statement is false, correct is to make a true statement.c. Subunit vaccines consist of pathogens that are alive but unable to cause disease.224views
Textbook QuestionWhich antibody class is abundant in body secretions? a. IgA, b. IgD, c. IgE, d. IgG, e. IgM.288views2rank
Textbook QuestionThe specificity of an antibody is determined by the (a) fixed segment, (b) antigenic determinants, (c) variable region, (d) size of the antibody, (e) antibody class.310views
Textbook QuestionGive one example of each type of immunity: innate immunity, naturally acquired active immunity, artificially acquired active immunity, artificially acquired passive immunity, and naturally acquired passive immunity.300views
Textbook QuestionYour friend tests her snake-wrangling skills on an eastern diamondback rattlesnake, and is bitten and envenomated (injected with the snake's venom). In the emergency department, doctors administer the antivenin CroFab, which contains antibodies to the toxins in snake venom. Is this an example of active or passive immunity? Will this confer any lasting protection to your friend?295views
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