Unit 23 The Immune System Defense Against Disease 3.pptx

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1. Adaptive Immune Response

2. Adaptive Immune System More specific component of the immune system A highly specific mechanism of the immune system that recognizes a particular pathogen Infectious agents

3. Innate and Adaptive Immune Response Effector mechanism is similar to innate immune response Adaptive immunity is specific to a particular pathogen by using cell-surface receptors Bacteria

4. Difference between innate and adaptive immunity Comparison between innate and adaptive immunity

5. Cells of the Adaptive Immune System T cells are involved with: Activation of phagocytic cells Release of chemicals and antigen-specific cells Immune cells

6. Cells of the Adaptive Immune System B cells are involved in: Steps that deal with the release of antibodies Immune cells

7. Development of B-cells and T-cells

8. Steps of the Adaptive Immune Response Recognition of the infectious pathogen Lymphocytes with receptors that can recognize infecting pathogen are selected to participate Pathogen recognition

9. Steps of the Adaptive Immune Response Selection of pathogen-specific lymphocytes T-cells and B-cells are selected based on positive and negative selections T cells

10. Steps of the Adaptive Immune Response Effector mechanism Adaptive immune response can be felt mostly a week after the infection started. Arm Redness as a result of immune response

11. Example of an Adaptive Immune Response Influenza virus causes an infection in the lower respiratory tract. Symptoms can be felt for 3-4 days after infection and will continue to persist for 5-7 days Symptoms of influenza

12. Immunological Memory Immunological memory refers to the body’s ability to quickly recognize and act against an antigen as a response to previous exposure Memory cells

13. Immunological Memory Acquired immunity is a type of adaptive immunity that provides an immunological memory Memory cells

14. Adaptive immune response refers to a highly specific mechanism of the immune system that recognizes a particular pathogen. 1 Immunological memory refers to the body’s ability to quickly recognise and act against an antigen. 2 The cells involved in immunological memory are memory T-cells and memory B-cells. 3

15. Write true if the statement is accurate, and false if otherwise. The adaptive immune response is slower than the innate immune response. All animals have the adaptive immune response. The adaptive immune response builds memory. The adaptive immune response becomes faster after the initial exposure. The innate immune response is more efficient in the first exposure.

16. Why is the adaptive immune system slow on the first exposure?