Question

_____ 21) Which of the following would you expect to see in a patient suffering from chronic allergies?

A) decreased IgG titers                  B) decreased IgM titers                 C) increased IgA titers

D) increased IgE titers                    D) none of the above, immunoglobulins don’t play a role

_____ 22) Which of the following statements regarding the cell-mediated immune response is FALSE?

A) Antigen presentation is needed for initial response to pathogen.

B) Cytotoxic T lymphocytes create memory cells.

C) Cell mediated responses kill intracellular pathogens by destroying infected host cells.

D) Cytotoxic T lymphocytes kill by phagocytosis.

E) Cytotoxic T lymphocyte can kill many target cells by sending signal for cell suicide (apoptosis)

24) A cell which has ingested a foreign invader and has displayed portions of this invader along    with the cell’s own MHC protein is called a

A) B-cell                                                B) helper T-cell

C) antigen presenting cell             D) suppressor T-cell                                        E) macrophage

Answer 1

21.

D: Increased IgE titers

The increases with the increase in IgE antibody value. Studies have shown that the people with high total IgE have an increased chance of allergic sensitization.

22.

B: Cytotoxic T lymphocytes create memory cells

Memory cells are created by B-lymphocytes

24.

C: antigen presenting cell

Antigen presenting cells are one of the WBC which ingests the antigen or microbe and attaches its antigenic portions to its own surface and thereby helps to display the antigens to helper T cells.

white blood cells that ingest a foreign substance or a microbe and attaches antigenic portions of the ingested material to its own surface, thereby displaying the antigens to a helper T cell