Exam 43: The Immune System

Use the following information to answer the following questions. An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick. -Which of the following is the last line of defense against an extracellular pathogen?

Which of the following is not True about helper T cells?

A patient can produce antibodies against some bacterial pathogens, but he does not produce antibodies against viral infections. This is probably due to a disorder in which cells of the immune system?

Use the information below as background for the following questions. Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus. -Which of the following could prevent the appearance of the symptoms of an allergy attack?

Use the information below as background for the following questions. Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus. -Bruton's disorder might occur because of which of the following molecular problems?

In some insects, such as Drosophila, fungal cell wall elements can activate the protein Toll. What is Toll's function?

Inflammatory responses may include which of the following?

The next questions refer to the following data on blood types. Case 1 Case 2 Case 3 Mother , , , Fetus , , , Figure 43.2 -An immune response to a tissue graft will differ from an immune response to a bacterium because

Use the information below as background for the following questions. Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus. -Which of the following might be a child with Bruton's disease?

Use the following information to answer the following questions. An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick. -Both lysozyme and cytotoxic T cells

Use the information below as background for the following questions. Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus. -The DGS-like phenotype can be produced in a specific knockout mouse for HA3, a Hox gene. HA3 is known to be involved in developmental regulation in the mouse. Which of the following would be an appropriate test for following the gene in the mouse progeny?

For one person to produce over a million different antibody molecules could not possibly require over a million different genes. Instead, this variability is accounted for by which processes?

Use the following information to answer the following questions. Cave art by early humans recognized the existence of the major signs of inflammation. -If a newborn were accidentally given a drug that destroyed the thymus, what would most likely happen?

Which of the following is a characteristic of the early stages of local inflammation?

Use the information below as background for the following questions. Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus. -A patient undergoes a high level of mast cell degranulation, dilation of blood vessels, and acute drop in blood pressure. These symptoms could be caused by which of the following?

Jenner successfully used cowpox virus as a vaccine against the virus that causes smallpox. Why was he successful even though he used viruses of different kinds?

Which of the following is not a component of an insect's defense against infection?

Which of the following would be most beneficial in treating an individual who has been bitten by a poisonous snake that has a fast-acting toxin?

What is the primary function of humoral immunity?

Use the information below as background for the following questions. Immunodeficiencies may be genetic in origin. Two examples of these are Bruton's agammaglobulinemia, an X-linked disorder, and DiGeorge syndrome, caused by a deletion from chromosome 22. Bruton's results in underdeveloped B cells, while DiGeorge syndrome results in a missing or seriously underdeveloped thymus. -Some pathogens can undergo rapid changes resulting in antigenic variation. Which of the following is such a pathogen?