A properly functioning immune system is responsible for ________.

Which event is the process of releasing chemical mediators?

A 16-year-old male with a low-grade fever, and large and painful red sores around his lips is being evaluated at a pediatric clinic. He has a PCR test pending that was swabbed from the sores, as well as a blood culture with Gram stain, and nasopharyngeal specimen for microscopic examination.   Analysis of the laboratory samples yield a diagnosis of herpes simplex virus. The patient’s mother is upset, as she does not believe her son is sexually active. The nurse explains that the presence of HSV does not imply sexual contact and provides education about the accuracy of the results. Which of the following is the best rationale for confidence in the diagnosis?

A twelve year old girl received a pair of earrings from her friend for her birthday.  The second time she wore them, her earlobes became red, itchy and inflamed, with blisters appearing within 48 hours.  What type of hypersensitivity is causing the discomfort?

Which process involves a more rapid synthesis and greatly increased titer of antibody when the immune system is subsequently exposed to the same antigen?

Which of the following is not a component of the second line of defense?

Human blood types involve all the following except ________.

Monocytes and lymphocytes are agranular leukocytes.

Monocytes and lymphocytes are agranular leukocytes.

Any heightened or inappropriate immune response resulting in tissue damage is called a(n) ________.