ch 13

2. a type of white blood cell and lymphocyte also known as CD4-positive cells
4. occurs when your own immune system produces antibodies and specialized cells to fight a specific pathogen
6. the process by which an individual's immune system becomes fortified against a disease causing infectious agent, typically through vaccination
9. a type of white blood cell that is a foundational part of the immune system
10. Y-shaped proteins produced by B cells and plasma cells that identify, neutralize, and tag foreign pathogens like bacteria and viruses for destruction
13. is the historical method of immunizing healthy people against smallpox by intentionally exposing them to material taken from the sores of someone infected with the Variolation virus
14. colorless immune cells produced in the bone marrow that protect the body against infections, foreign invaders, and diseases
16. is any immunity obtained by inoculation with selected antigens/parts of a microbe, or in some cases, the entire microbe

1. a targeted defense mechanism in vertebrates that recognizes, destroys, and remembers specific foreign substances or antigens
3. white blood cells that destroy virus infected cells, damaged cells, and cancer cells
5. a primary type of white blood cell essential for cell-mediated adaptive immunity
7. a type of white blood cell that forms a core part of the adaptive immune system and drives humoral immunity by producing specialized proteins called antibodies
8. a specialized subset of CD4+ white blood cells that suppress immune responses, maintain self tolerance, and prevent autoimmune diseases
11. thought to use cowpox to prevent smallpox
12. the protection you get when you receive ready made antibodies from another person or source, rather than making them through your own immune system
15. substances that can elicit a response from a B or T cell