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The Immune System: Functional Overview

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Questions and Answers

What is the primary function of eicosanoids in the context of inflammation?

To increase blood clotting
To lower gastric secretions
To stimulate uterine contractions
To induce asthma-like allergic reactions (correct)

What is the main function of antibodies in the immune response?

To recognize and bind to a specific antigen (correct)
To produce IL-2
To stimulate uterine contractions
To lower blood pressure

Which type of antibody is involved in fatal allergic reactions?

IgM
IgG
IgE (correct)
IgA

What is the role of IgM and IgD in the immune response?

They serve as a major antigen receptor on the surface of B cells (A) Signup and view all the answers

What is the primary function of macrophages in the immune response?

To kill pathogens and irritants through the killing mechanism (A) Signup and view all the answers

Which type of antibody is the only one that can cross the placenta and protect the developing fetus?

IgG (B) Signup and view all the answers

What is the primary function of the lymphatic system?

To provide an accessory return route to the blood for the surplus 3L of plasma (C) Signup and view all the answers

What type of granules do neutrophils contain?

Primary granules and secondary granules (A) Signup and view all the answers

What is the role of macrophages in the immune system?

To phagocytose and kill microbes in tissues (B) Signup and view all the answers

What is the function of Toll-like receptors (TLRs) in the immune system?

To act as sensors and recognize microbial components (C) Signup and view all the answers

What is the role of cytokines in the immune system?

To act as signaling proteins and coordinate the immune response (D) Signup and view all the answers

What is the function of complement proteins in the immune system?

To bind and coat microbes, facilitating phagocytosis or direct lysis (D) Signup and view all the answers

What is the mechanism by which neutrophils kill pathogens?

Through the action of oxidative burst (D) Signup and view all the answers

What is the role of B cells in the immune system?

To produce antibodies against pathogens (D) Signup and view all the answers

What is the role of helper T cells in the immune system?

To recruit B cells to produce antibodies (A) Signup and view all the answers

What is the function of the spleen in the immune system?

To store and produce lymphocytes (C) Signup and view all the answers