FREE AND STUDY GAMES ABOUT AP CHAP 21 EXAM

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FREE AND STUDY GAMES ABOUT AP CHAP 21 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -58 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: ___are released by activated t cells and macrophages to mobilize immune cells and attract other leukocytes intot he area

Answer:

cytokines

Question 2: immunocompetence____

Answer:

is the ability of individual cells to recognize a specific antigen by binding to it Question 3: which of the following would be classified as a delayed hypersensitivity reaction?

Answer:

allergic contact dermatitis

Question 4: __predominate at the sites of chronic infections

Answer:

macrophages

Question 5: which of the statements below does not describe antigens?

Answer:

antigens only come from microbes

Question 6: what is the role of interferon in defense against disease?

Answer:

protects cells that have not yet been infected by viruses Question 7: monoclonal antibodies are used for the diagnosis of all of the following except___

Answer:

juvenile diabetes

Question 8: select the correct statement about active and passive immunity

Answer:

active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies

Question 9: which of the following is not a type of t cell

Answer:

antigenic

Question 10: clonalk selection of bcells

Answer:

results in the formation of plasma cells Question 11: which of the following cells is the most critical cell in immunity?

Answer:

helper T cell Question 12: which of the following is true about the number of binding sites per functional antibody unit

Answer:

IgM contains 10 binding sites

Question 13: cancer cells and virus infected body cells can be killed before activation of adaptive immunity by___

Answer:

Natural killer cells

Question 14: the primary immune response___

Answer:

has a lag period while b cells proliferate and differentiate into plasma cells

Question 15: select the correct statement about complement

Answer:

an adaptive immune mechanism is often involved in direction complement to its target

Question 16: b cells respond to the initial antigen challenge by____

Answer:

producuing progeny cells that include plasma cells and memory cells

Question 17: which of the following is not a method by which antibodies work?

Answer:

activating cytokines

Question 18: graft rejection may be caused by

Answer:

using a xenograft

Question 19: which statement is true about t cells?

Answer:

their proliferation is enhanced by interleukins 1 and 2

Question 20: antibody functions include all of the following except___

Answer:

cross linking cell bound antigens on red blood cells when blood types are properly matched

Question 21: select the correct statement about the function of antibodies

Answer:

complement fixation is the main mechanism by which antibodies provide protection

Question 22: cyto toxic t cells ___

Answer:

are the only t cells that can directly attack and kill other cells

Question 23: which of the following statements is incorrect of false?

Answer:

class II MHC molecules appear only on the surface of antigen presenting cells, thymic cells and t cells that have been activated by exposure to antigens

Question 24: select he correct statement about immunodeficiency

Answer:

the causative agent in acquired immune deficiency syndrome (aids) is a virus that recognizes cd4 proteins

Question 25: helper t cells

Answer:

function in the adaptive immune system activation Question 26: which of the following is not characteristic of the adaptive immune system?

Answer:

it is specific for a given organ Question 27: which of the following is not a mechanism for the development of autoimmune disorders?

Answer:

a second exposure to an allergen

Question 28: natural killer (nk) cells____

Answer:

can kill cancer cells before the immune system is activated