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.
The relative proportions of body region representation in the motor cortex (anterior to the central
Circulatory System
Neuro System
A highly simplified view of the overall plan of the human body.
Your Body Digests, Absorbs, and Synthesizes Protein
The lifetime risk for schizophrenia varies with the degree of relationship to an affected individual