04:02The Humoral Immune Response - Immunology AnimationsDr.G Bhanu Prakash Animated Medical Videos1156views
06:57Immunoglobulins Structure and Function / Antibody Structure Types and FunctionMEDSimplified847views
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. Agglutination274views1rank
Multiple ChoiceWhich of the following statements is characteristic of a secondary humoral response?973views
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.315views1rank
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?236views
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?244views
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. IgD240views
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?286views1rank
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.233views
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 membrane200views
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.210views
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?325views
Textbook QuestionHow does the formation of an antigen–antibody complex cause the elimination of an antigen?225views
Textbook QuestionName the five antibody classes and describe where each is most likely to be found in the body.255views1rank
Textbook QuestionDifferentiate between a primary and a secondary immune response. Which is more rapid and why?279views
Textbook QuestionAntibodies released by plasma cells are involved in a. humoral immunity, b. immediate hypersensitivity reactions, c. autoimmune disorders, d. all of the above.298views1rank
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.270views
Multiple ChoiceWhich immune cell is able to respond quickly after any subsequent encounter with the same antigen?993views
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?238views
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 selection209views
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.209views
Textbook QuestionWhich antibody class is abundant in body secretions? a. IgA, b. IgD, c. IgE, d. IgG, e. IgM.276views2rank
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.295views
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.284views
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?292views
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