Answer:
B. Pathogen
Explanation:
An antibody is a type of protein that is part of the immune systems defense against diseases. Immunaglobin in the most common antibody.
A pathogen is bacteria, virus, etc that causes disease. An example would be Streptococcus, the flu, etc
An antigen is some sort of toxin/foriegn substance that lowers the immune systems responses. An example would be like snake poision or toxic waste.
A lymph node is an organ that kinda looks like a kidney. its part of the immune system and helps absorbe/dispose of sickness, infection, etc. we have them all over our bodies.
Most medical professionals don’t include environmental information because there are so many environmental factors that affect different people.
AIDS is treatable but not curable and Chlamydia is curable
A-2
B-1
For example surgeon typically makes more money than a medical seceretary
