Higher Human Biology - Unit 3 (KA6)

2. Individuals with AIDS are especially vulnerable to these types of infections.
5. Cells that destroy infected body cells by inducing apoptosis.
6. Structure formed when antibodies bind to antigens, which is then destroyed by phagocytosis.
8. Molecules, often proteins on cell surfaces, that trigger a specific immune response.
11. White blood cells involved in the specific immune response.
12. Programmed cell death triggered by T lymphocytes.
15. Faster and greater antibody production compared to the primary response.
16. Long-lived cloned lymphocytes that produce a rapid response upon secondary exposure to the same antigen.
17. Virus that attacks and destroys T lymphocytes.

1. Caused when T lymphocytes respond to self-antigens such as rheumatoid arthritis.
3. Molecules on the body’s own cells normally recognised as harmless.
4. Released by T lymphocytes into infected cells to stimulate production of self-destructive enzymes.
7. Cells that produce antibodies.
9. Y-shaped proteins with receptor binding sites specific to particular antigens.
10. Group of identical lymphocytes formed after repeated division when an antigen binds to a receptor.
12. Condition caused by HIV, leading to a weakened immune system.
13. Hypersensitive response of B lymphocytes to harmless antigens such as pollen.
14. Structure on a lymphocyte that is specific to a single antigen.