What occurs within lymph nodes

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Question

Body Defenses and Immune System

1. Describe 3 major functions of the lymphatic system.

2. What occurs within lymph nodes?

4. What characteristics of the skin help to protect against pathogens?

6. What mechanisms are considered to be the second line of defense against pathogens?

7. Phagocytosis is performed by two types of white blood cells, _________________ and _________________. The latter become very large (monster) cells called _____________________ in the tissues.

8. Lymphocytes known as NK, or ________________________ cells attack cancerous or virus-infected cells by _____________. These cells are part of the specific/nonspecific (circle one) defense because ______________________ _______________________.

9. Describe the major steps of the inflammatory response, including the initial trigger, the role of histamines, and actions of WBCs.

10. Compounds secreted by virus-infected cells, called _____________________, promote cell defenses by what mechanism?

11. How is fever a defense mechanism? When is a fever dangerous?

12. What is an antigen? How are antigens related to MHC proteins?

13. Lymphocytes are of 2 types: ____________ which mature in the ___________, and ____________ which mature in the ______________.

14. How does binding of an antibody to an antigen defend the body?

15. Why are T cells described as conducting cell-mediated immunity?

16. HIV attacks helper T cells. Why is this so deadly?

17. Explain how our immune system can remember a pathogen. Describe the differences between a primary and secondary response to an antigen.

18. Active immunity is produced when we are vaccinated. Explain how active immunity protects us and give an example.

19. Describe two examples of autoimmune disorders.

Reference no: EM133929385

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