Answer to Question 1
Answer: The key to the body's successful immune system is the ability to distinguish self (or proteins that belong to its body) from non-self (proteins that belong to any other living thing).
Answer to Question 2
Answer: Cytotoxic T cells directly kill virus-infected cells and tumor cells. Helper T cells secrete proteins that promote inflammation by calling for the microphages to the site, stimulating B cells, and activating the cytotoxic T cells. Regulatory T cells help lower the immune response once the infection is under control. Memory T cells remember an antigen and therefore can produce new fighting cells rapidly.
Procedures and Diagnostic Tests Related to the Female Reproductive System
Chlamydospore or spherule that occurs at body temperature.
Fascial sheaths surrounding and linking the muscles of the back of the body.
Nutrition and Body Weight
Respiratory system of a bird.
Example of an antibody-mediated immune response.