Which white blood cells are involved in releasing histamine during an allergic reaction?

Correct Answer: A

Rationale: Basophils are a type of white blood cell that are involved in releasing histamine during an allergic reaction. When an allergen triggers the immune system, basophils release histamine and other chemical mediators. Histamine plays a key role in the inflammatory response associated with allergies, leading to symptoms such as itching, hives, and swelling. Basophils are known for their role in allergic reactions and are an important part of the body's defense against parasites and in the inflammatory response.

Correct Answer: C

Rationale: Iron-deficiency anemia is a common type of anemia characterized by a lack of iron in the body, which leads to decreased production of red blood cells containing hemoglobin. The assessment findings characteristic of iron-deficiency anemia include dyspnea (shortness of breath) due to decreased oxygen-carrying capacity of the blood, tachycardia (rapid heart rate) as the body tries to compensate for decreased oxygen delivery, and pallor (pale skin and mucous membranes) due to reduced red blood cell production. These symptoms result from insufficient iron levels affecting the body's ability to produce an adequate number of healthy red blood cells. Night sweats, weight loss, and diarrhea are not typically associated with iron-deficiency anemia. Nausea, vomiting, anorexia, itching, rash, and jaundice are also not primary manifestations of iron-deficiency an

Correct Answer: D

Rationale: In the case of an acute hemolytic reaction during a blood transfusion, the most important nursing intervention is to immediately stop the transfusion and infuse normal saline solution. This is crucial to prevent further complications associated with the hemolysis of red blood cells. Normal saline helps maintain blood pressure and support kidney function, which may be compromised during a hemolytic reaction. Additionally, notifying the blood bank is important to investigate and prevent future reactions, and to determine if there was an error in blood compatibility. Administering antihistamines or changing the fluid type (such as dextrose 5% in water) will not address the underlying issue of hemolysis and may not be the most appropriate interventions in this scenario.

Correct Answer: C

Rationale: The correct answer is C. An individual has no risk of exposure to HIV when they limit sexual contact to those without HIV antibodies. This is because HIV is primarily transmitted through contact with body fluids such as blood, semen, vaginal fluids, and breast milk of an infected person. If an individual only engages in sexual activities with people who do not have HIV antibodies, the risk of exposure to the virus is significantly reduced. It is important to note that although this reduces the risk, it does not completely eliminate it, as there is still a chance of transmission through other means such as sharing needles or from mother to child during pregnancy, childbirth, or breastfeeding.

Correct Answer: C

Rationale: Severe anemia is associated with a reduced number of red blood cells, leading to decreased oxygen delivery to the body's tissues. Therefore, symptoms commonly seen in patients with severe anemia include pallor (pale skin), fatigue (due to decreased energy levels), and dyspnea (shortness of breath) especially on exertion (due to the heart working harder to compensate for the reduced oxygen-carrying capacity of the blood). Cold sensitivity is not a typical symptom of anemia and is not directly related to the reduced oxygen-carrying capacity of the blood.