WVU NSG 460 Immunology I Exam 5 Content Questions And Answers | 2026 Updated Solutions | 100% Correct Answers

What is the overall purpose of the immune system? -to distinguish self from non-self -we do this through our WBCs Three Main Problems Immune System Doesn't Work -example: AIDS or immunosuppression Immune System Attacks Itself -example: autoimmune disorder Immune System Goes Overboard -example: anaphylaxis Who is considered immunosupressed? -chemotherapy patients -infants ^their immune system has not developed fully -geriatrics ^have immuno-depression as they ageWhite Blood Cells -normal WBC: 5,000-10,000 (may see 5 to 10) -have differentials ^this means there are various forms of WBCs within our body Differentials Eosinophils -involved with allergic reactions (neutralizes histamine) -digests foreign proteins ^a way I remember is E-osinophils are involved with E-llergic reactions Basophils -contain histamine -integral part of hypersensitivity reactions -deal with our T & B Cells Neutrophils -arrive to the site of action FIRST -you know there is an issue occurring within the body if this lab level is elevated T and B Cells B-Cells -show up and make antibodies -build up defenses and encourage chemical mediators ^they way I remember this is antibodies remind me of bodyguards (bodyguards defend)T-Cells -natural killers -they kill whatever is at the site ^the way i remember this is T stands for "take-em out" Neutrophils/PMN -most common WBC -crucial for fighting bacterial infections AIDS -first recognized in 1981 -caused by a retrovirus, otherwise known as Human Immunodeficiency Virus (HIV) -affects both cellular and humoral immunity Estimates of HIV/AIDS in 2018 -37.9 million people have it (down from 2005 when it was 40 million) -1.2 million people in the US had HIV at the end of 2018 -770,000 people have died from AIDS-related illnesses since the start of the epidemic -15,820 people died in 2018