Immune System and Answer

Topics: Immune system, Action potential, Neuron Pages: 6 (1227 words) Published: April 8, 2013
5) The lymphatic system involves which of the following organs? E) A, B, and
Answer E
7) In the inflammatory response, the absence of which of the following would prevent all the others from happening? D) release of histamine
Answer: D
10) Inflammatory responses may include all of the following except C) reduced permeability of blood vessels to conserve plasma. Answer: C
12) A bacterium entering the body through a small cut in the skin will do which of the following? E) activate a group of proteins called complement
Answer: E
15) What are antigens?
D) foreign molecules that trigger the generation of antibodies Answer: D
21) When would B cells produce effector cells?
A) between 0 and 7 days
Answer: A

22) When would memory cells be produced?
E) both A and C
Answer: E
27) The MHC is important in
E) both A and D
Answer: E
29) In which of the following situations will helper T cells be activated? A) when an antigen is displayed by a dendritic cell
Answer: A
A. cytotoxic T cells
B. natural killer cells
C. helper T cells
D. macrophages
E. B cells
31) These cells are involved in cell-mediated immunity and destroy virally infected cells. Answer: A
Topic: Concept 43.3
Skill: Knowledge
32) These cells have a function that is similar to the function of dendritic cells. Answer: D
Topic: Concept 43.3
Skill: Knowledge
33) These cells are involved in cell-mediated immunity, and they respond to class I MHC molecule-antigen complexes. Answer: A
Topic: Concept 43.3
Skill: Knowledge
34) These cells are involved in innate immunity, and a person lacking these cells may have a higher than normal chance of developing malignant tumors. Answer: B
36) Which of the following is a pathway that would lead to the activation of cytotoxic T cells? B) body cell becomes infected with a virus → synthesis of new viral proteins → class I MHC molecule-antigen complex displayed on cell surface Answer: B

38) The following events occur when a mammalian immune system first encounters a pathogen. Place them in correct sequence and then choose the answer that indicates that sequence. I. Pathogen is destroyed.

II. Lymphocytes secrete antibodies.
III. Antigenic determinants from pathogen bind to antigen receptors on lymphocytes. IV. Lymphocytes specific to antigenic determinants from pathogen become numerous. V. Only memory cells remain.

E) III, IV, II, I, V
Answer: E
39) Which cell type interacts with both the humoral and cell-mediated immune pathways? E) helper T cells
Answer: E
42) CD4 and CD8 are proteins
D) that are present on the surface of T cells where they enhance cellular interaction. Answer: D
45) B cells interacting with helper T cells are stimulated to differentiate when E) helper T cells release cytokines.
Answer: E
51) Which of the following statements about humoral immunity is correct? D) It is mounted by lymphocytes that have matured in the bone marrow. Answer: D
57) The successful development of a vaccine to be used against a pathogen A) is dependent on the surface antigens of the pathogen not changing. Answer: A
58) What would be the major concern for an individual with type A blood who receives a transfusion of type B blood? B) the antibodies in the serum of the recipient
Answer: B
59) A transfusion of type A blood given to a person who has type O blood would result in which of the following? B) the recipient's anti-A antibodies clumping the donated red blood cells Answer: B

60) In which of the cases could the mother exhibit an anti-Rh-factor reaction to the developing fetus? A) case 1 only
Answer: A

61) In which of the cases would the mother not exhibit an anti-Rh-factor reaction to the developing fetus? C) cases 2 and 3 only
Answer: C

62) In which of the cases would the precaution likely be taken to give the mother anti-Rh antibodies before delivering her baby? A) case 1 only
Answer: A
65) An immune...
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