Chapter 22 The Lymphatic System and Immunity Exam Questions And Verified Answers 100% Guaranteed Pass

Chapter 22: The Lymphatic
System and Immunity Exam
Questions And Verified
Answers 100% Guaranteed
Pass


Autoimmune illness results from a failure of what aspect of immunity?

(a) specificity (b) versatility

(c) tolerance (d) memory. - correct answer C



The process by which the surface of microorganisms is covered with complement and
antibodies, making it easier to phagocytize is

(a) precipitation

(b) neutralization

(c) opsonization

(d) agglutination. - correct answer C



When an antigen is bound to a class I MHC molecular, it can stimulate a ___ cell.

(a) plasma

(b) B

(c) helper T

(d) cytotoxic T - correct answer D

, Class II MHC molecules are found only on

(a) lymphocytes and antigen presenting cells (b) red blood cells

(c) nucleated body cells

(d) granulocytes and microphages. - correct answer A



T cells and B cells can be activated only by

(a) pathogens

(b) exposure to a specific antigen at a specific site in a plasma membrane

(c) interleukins, interferons and colony stimulating factors

(d) all of these - correct answer B



B cells are activated by the activities of

(a) antibodies

(b) plasma cells

(c) helper T cells

(d) interferon - correct answer C



Antibodies that normally cross the placenta are (a) IgM (b) IgA (c) IgG (d) IgD. - correct answer C



During a primary response,

(a) IgM is initially higher than the IgG titer

(b) IgG titer is initially higher than the IgM titer (c) IgM titer and IgG titer rise in parallel

(c) only the IgM titer is affected. - correct answer A



Cytokines that make a cell and its neighbors resistant to virus infection are

(a) interleukins