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Bio 320 Exam 3 Practice Questions and Answers (100% Pass) Activation of mature naive T lymphocytes by antigen presentation with MHC II results in the production of effector cells called: - Answer️️ -helper T cells Activation of a mature naive T cell by an APC requires three critical signa...

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  • August 27, 2024
  • 14
  • 2024/2025
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©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM


STONY BROOK UNIVERSITY & ARIZONA UNIVERSITY
Bio 320 Exam 3 Practice Questions and
Answers (100% Pass)

Activation of mature naive T lymphocytes by antigen presentation
with MHC II results in the production of effector cells called: -
Answer✔️✔️-helper T cells

Activation of a mature naive T cell by an APC requires three critical
signals. Which of the following is NOT an intracellular signal
generated in the T cell? - Answer✔️✔️-intracellular signal from MHC
II

What signals influence the differentiation of mature naive T cells
into TH1 vs. TH2 subsets? - Answer✔️✔️-polarizing cytokines from
other immune cells

Which immune cells are activated by the cytokines (IFN-gamma and
IL-2) produced by TH1 cells? - Answer✔️✔️-B cells

cytotoxic T cells

natural killer cells

macrophages

Which type of pathogen is targeted by a TH2 response? -
Answer✔️✔️-parasitic worms




1

, ©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM


STONY BROOK UNIVERSITY & ARIZONA UNIVERSITY
Why is the TH17 response useful against bacterial and fungal
infections? - Answer✔️✔️-It recruits neutrophils to phagocytose these
microbes

Which of the following is the most functionally similar to Ig-alpha
and Ig-beta? - Answer✔️✔️-CD3 complex

During primary exposure to a pathogenic microbe, what is the role
of innate immune cells? - Answer✔️✔️-trigger the inflammatory
response to recruit immune cells



eliminate microbes by phagocytosis and antimicrobial proteins



limit growth and spread of microbes with antimicrobial proteins



activate adaptive immunity with antigen presentation and cytokine

When professional APCs present antigens to mature naive T cells,
intracellular signals cause the antigen-specific T cells to undergo
rounds of mitosis. This is called clonal: - Answer✔️✔️-expansion

When naive T cells are activated, they secrete a cytokine called
interleukin-2 (IL-2). IL-2 binds to receptors (IL-2R) on the T cell,
which stimulates the secretion of more IL-2 and an increased
expression of IL-2R. What type of signalling is responsible for this




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