Kuby Immunology Chapter 1-4 |59 Questions| With Correct Answers.

B {Ans: Which of the following BEST describes chemokines? A. Membrane receptors that detect the presence of soluble messengers in the environment B. Soluble proteins that recruit specific cells to an area C. Chemical messengers that induce cell differentiation D. Transcription factors that induce the expression of genes involved in cell adhesion E. Adhesion molecules that bind to the inside of blood vessels}B {Ans: In an individual predisposed to allergic responses, which of the following statement best describes the outcome of his/her exposure to an allergen: A) Within weeks of exposure, large amounts of allergen-specific IgM will be present in the serum B) Clinical reactions such as wheezing and sneezing may soon manifest soon after exposure due to the presence of allergen-specific IgE that is retained by cells such as mast cells that express Fc receptors C) IgG responses will control the allergic responses by suppressing the ability of activated allergen-specific B cells to undergo IgE class switching D) Circulating allergen-specific IgE will initiate an inflammatory response that may manifest as runnny, itchy eyes E) all of the above}D {Ans: Papain digestion of an IgG preparation of antibody specific for the antigen hen egg albumin (HEA) will