A nurse working in a burn unit cares for clients with complicated body system responses. Which response describes the body's initial reaction to a severe burn injury?

A. Immediate allergic reaction mediated by sensitized mast cells. This describes a Type I hypersensitivity reaction, which is an immediate allergic reaction. It involves IgE antibodies and mast cell degranulation, leading to symptoms such as hives, anaphylaxis, and respiratory distress. Latex allergies can involve Type I reactions, but delayed hypersensitivity is a Type IV reaction.
B. Antigen-antibody complexes deposit in tissues activating inflammation. This describes a Type III hypersensitivity reaction, which involves immune complex deposition leading to inflammation, as seen in lupus or serum sickness. Latex allergies do not involve immune complex deposition.
C. T-cells sensitization initiates the macrophage release of cytokines causing a delayed reaction. This describes a Type IV hypersensitivity reaction, which is a delayed-type hypersensitivity (DTH) mediated by T-cells rather than antibodies. In latex-induced delayed hypersensitivity, T-cells recognize latex proteins and release cytokines, leading to localized skin inflammation, rash, and itching, typically 24–48 hours after exposure.
D. Antibodies are formed against antigens on cell surfaces. This describes a Type II hypersensitivity reaction, which involves antibody-mediated destruction of cells, as seen in hemolytic anemia or blood transfusion reactions. Latex allergies do not involve direct antibody attack on cells.

A. Obtain at least 8 to 10 hours of sleep per night. Adequate sleep is important for overall health, but it is not a primary recommendation for cancer prevention. There is some evidence linking sleep disturbances to cancer risk, but maintaining a healthy weight and exercising have stronger associations with cancer prevention.
B. Refrain from alcohol. Limiting alcohol intake is recommended, but complete abstinence is not necessary for everyone. Moderate alcohol consumption is associated with an increased risk of certain cancers (e.g., breast, liver, esophageal), but maintaining a healthy weight and exercising have broader, more significant cancer prevention benefits.
C. Maintain a healthy weight and exercise regularly. Obesity and a sedentary lifestyle are major risk factors for multiple types of cancer, including breast, colon, and endometrial cancer. Regular physical activity reduces inflammation, improves immune function, and regulates hormones, all of which lower cancer risk.
D. Know the four warning signs of cancer. While recognizing cancer warning signs is important for early detection, prevention strategies are more effective in reducing overall cancer risk. There is no universally agreed-upon list of "four" warning signs, as different cancers present with different symptoms.