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The Immune System: Definitions and Overview

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The Immune System: Definitions and Overview

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Questions and Answers

What is the primary function of the immune system?

To distinguish between self and foreign substances (correct)

To produce cytokines

To destroy abnormal or dead cells

To produce antibodies

Which of the following is NOT a type of immune response?

Innate immunity

Homeostasis (correct)

Adaptive immunity

Active immunity

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

To destroy abnormal or dead cells

To produce antibodies

To produce cytokines

To filter out foreign substances from the blood (correct)

What type of cells are responsible for killing invaders in the immune system?

Natural killer cells Signup and view all the answers

What is the term for the collective and coordinated response to the introduction of foreign substances in an individual?

Immune response Signup and view all the answers

What is the main difference between innate and adaptive immunity?

Innate immunity is rapid but non-specific, while adaptive immunity is slower but specific. Signup and view all the answers

Which of the following is NOT a type of innate immune mechanism?

Clonal expansion Signup and view all the answers

What is the primary function of lysozymes in the innate immune response?

To break down bacterial cell walls Signup and view all the answers

What is the role of natural killer cells in the innate immune response?

To directly attack and kill infected cells Signup and view all the answers

What is the key feature of adaptive immunity that is not present in innate immunity?

Specificity Signup and view all the answers

Study Notes

The immune system consists of cells, tissues, and molecules that provide resistance to infections, with the role of defending against microbes, tumor cells, and maintaining homeostasis. It is composed of organs (e.g., tonsils, thymus, lymph nodes) and cells (e.g., T-lymphocytes, B-lymphocytes, natural killer lymphocytes) that work together to provide immunity. There are two types of immunity: innate immunity, which provides immediate defense, and adaptive immunity, which adapts to infections and is mediated by T- and B-lymphocytes.

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Description

This quiz covers the basics of the immune system, including the definition of immune system, immunology, immunity, and immune response. Test your understanding of these fundamental concepts!