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15 Questions

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Ch1pp5-6

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Questions and Answers

Which type of adaptive immunity combats extracellular microbes?

Innate immunity

Cell-mediated immunity

Passive immunity

Humoral immunity (correct)

What is the primary effector mechanism of cell-mediated immunity?

Secreted antibody

Killing infected cells by T lymphocytes (correct)

Preventing infections by antibodies

Activation of phagocytes by cytokines

Which type of adaptive immunity recruits and activates phagocytes to destroy ingested microbes?

Acquired immunity

Innate immunity

Cell-mediated immunity (correct)

Humoral immunity

Which type of adaptive immunity is mediated by B lymphocytes?

Humoral immunity Signup and view all the answers

What is the effector mechanism of Cytotoxic T lymphocytes?

Kills infected cell Signup and view all the answers

How do antibodies defend against microbes present in the gastrointestinal and respiratory tracts?

By preventing them from infecting tissue cells Signup and view all the answers

What is the main function of antibodies in defending against extracellular microbes?

Preventing microbial entry into tissue cells Signup and view all the answers

How are antibodies transported to protect the fetus and newborn from infections?

Through the placenta into the fetal circulation Signup and view all the answers

What is cell-mediated immunity primarily responsible for defending against?

Intracellular organisms Signup and view all the answers

What is a major function of cytokine-producing helper T lymphocytes?

Activating phagocytes to destroy ingested microbes Signup and view all the answers

What do most T cells recognize?

Peptide fragments of protein antigens presented on cell surfaces Signup and view all the answers

How is active immunity induced in an individual?

By infection or vaccination Signup and view all the answers

What characterizes passive immunity?

Transfer of antibodies from an actively immunized individual to a naive individual Signup and view all the answers

What is a physiologic example of passive immunity?

Newborns acquiring antibodies through placenta and breast milk Signup and view all the answers

How has passive immunity been used clinically for treating viral infections like SARS-CoV-2?

Using serum from immunized donors or purified antibodies from infected individuals for treatment. Signup and view all the answers