NAIMMCQ: Immunology

A) each cell has the proper surface code or "identity flag"
B) it has a lack of class 1 MHC
C) the surface code or "identity flag" looks the way it should
D) it is coated with antibodies

Answer: C

Which statement is true about T cells?

A) They usually directly recognize antigens, which then activates a subpopulation of killer cells.
B) Their proliferation is enhanced by interleukins 1 and 2.
C) Once activated, they cannot secrete cytokines.
D) They will develop into cytotoxic T cells if antigen is complexed with class II MHC proteins.

Answer: B

Antibody functions include all of the following except ________.

A) binding and inactivating chemical toxins released by bacteria or other microorganisms
B) cross-linking cell-bound antigens on red blood cells when blood types are properly matched
C) linking soluble antigens together so that they fall out of solution
D) targeting foreign cells so that complement proteins can cause cellular lysis

Answer: B

Select the correct statement about complement.

A) A specific immune mechanism is often involved in directing complement to its target.
B) Complement can be activated through three pathways: classical, secondary, and alternate.
C) The membrane attack complex consists of complement proteins C3a through C5.
D) Complement proteins C1 through C9 act exclusively in the classical pathway.

Answer: A

There are over ________ different types of antigen receptors.

A) ten
B) a thousand
C) a million
D) a billion

Answer: D

Select the correct statement about the function of antibodies.

A) Antibodies may directly destroy "invaders."
B) Neutralization is the process by which antibodies cause invading cells to clump together.
C) Complement fixation is the main mechanism by which antibodies provide protection.
D) The most potent agglutinating agent is IgG.

Answer: C

Which of the following represents the primary site where immature T-cells referred to nude or double negative lymphocytes, will be found?

Which of the following receptor types is used in T-cell independent activation of a virgin B-cell?

Which of the following surface molecules do cytotoxic lymphocytes use to induce the death of infected host cells?

If a self-reactive lymphocyte ultimately binds to a self-antigen on tissue cell without co-stimulation, it's function is shut down in a process called?

Signal transduction proteins send a signal to the nucleus that an cell surface antigen-receptor has bound to its cognate antigen. Which of the following represents the signal transduction proteins found in a T-cell receptor

Which of the following processes is used in affinity maturation the fine-tuning of an antibody molecule?

If a memory B-cell is reactivated by its cognate antigen which of the following differentiated cell types can it become?

B-microglobulin molecule are exclusively associated with which of the following?

Mhc2 receptors are found on all of the following cells except?

Differentiating lymphocytes displaying antigen-receptors that cross react with self-molecules will be neutralised and put out of commission by which process?

Which of the following cells is activated to kill an infected body cell when it displays an invasive antigen presented by an MHC1 receptor?

Tc cells check each cell to see if ________.

Which statement is true about T cells?

Antibody functions include all of the following except ________.

Select the correct statement about complement.

There are over ________ different types of antigen receptors.

Select the correct statement about the function of antibodies.

The primary immune response ________.

Clonal selection of B cells ________.

Natural killer (NK) cells ________.