FREE AND STUDY GAMES ABOUT CH 43 BIO EXAM

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FREE AND STUDY GAMES ABOUT CH 43 BIO EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -16 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Give an example of inflammatory response...

Answer:

example...increased activity of phagocytes in an inflamed area Question 2: A Bacterium entering the body through a small cut in the skin will do what...

Answer:

activate a group of proteins call complement Question 3: 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:

natural killer cells Question 4: B cells interacting with helper T cells are stimulated differentiate when...

Answer:

helper T cells release cytokines.

Question 5: Clonal selection is an explanation of how

Answer:

an antigen can provoke production of high levels of specific antibodies.

Question 6: What are antigens?

Answer:

foreign molecules that trigger the generation of antibodies Question 7: Both the eye and the respiratory tract are protected against infections by what?

Answer:

the secretion of lysozyme onto their surface Question 8: which of the following is the last line of defense against an extracellular pathogen?

• histamine release by basophils
• Lysozyme productions
• Phagocytosis by neutrophils
• Antibody production by plasma cells
• Phagocytosis by natural killer ce

Answer:

• Antibody production by plasma cells

Question 9: What pathway would lead to the activation of cytotoxic T cells?

Answer:

Body cell becomes infected with a virus-> new viral proteins appear -> class I MHC molecule-viral antigen complex displayed on cell surface Question 10: A bacterium has elements on its surface that are resistant to lysozyme. If an individual is infected with this bacterium, what would occur first?

Answer:

Successful reproduction of the bacterium and continued disease

Question 11: Give an example that would account for immunological memory...

Answer:

the ancient observation that someone who had recovered from the plague could safely care for those newly diseased Question 12: Phagocytosis of microbes by macrophages is enhanced by which of the following?

• The Binding of Antibodies to the surface of the microbes
• Antibody-mediated agglutination of microbes
• the release of cytokiness by activated b cells
• A and B

Answer:

• A and B.

Question 13: Which action below is affected by an antihistamine?

• Clonal selection by antigens
• MHC Presentation by Macrophages
• Blood Vessel dilation
• the secondary immune response
• Phagocytosis of antigens

Answer:

• Blood Vessel Dilation

Question 14: A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to...

Answer:

interact with a class II MHC- antigen complex

Question 15: What cell type interacts with both the humoral and cell-mediated immune pathwawys?

Answer:

helper t cells

Question 16: Which of the following are T cells of the immune system?

• CD4, CD8, and plasma cells
• Class I MHC, Class II MHC, and memory cells
• Cytotoxic and helper cells
• Plasma, antigen-presenting and memory cells
• Lymphocytes, macrophage&Dendritic ce

Answer:

• cytotoxic and helper cells