Nokea
A client informs the nurse that he is having a difficult time coping with seasonal allergies and has taken some over-the-counter medications to assist with control of symptoms. What results would indicate to the nurse that the client does have allergies?
- A. Elevated eosinophils
- B. Elevated basophils
- C. Elevated monocytes
- D. Elevated neutrophils
Correct Answer: A
Rationale: Eosinophils phagocytize foreign material. Their numbers increase in allergies, some dermatologic disorders, and parasitic infections. Basophils are also capable of phagocytosis; they are active in allergic contact dermatitis and some delayed hypersensitivity reactions. Monocytes engulf microbial invaders and display the antigenic surface to T lymphocytes. Neutrophils are a major component of the inflammatory response and defense against bacterial infection.
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Macrophages attack and destroy foreign substances to the body. Where does this action occur?
- A. At the site of trauma
- B. In the lymph node
- C. In the vascular system
- D. In the thymus
Correct Answer: B
Rationale: As lymph passes through the node, macrophages attack and engulf foreign substances such as bacteria and viruses, abnormal body cells, and other debris. The other options are incorrect.
The nursing instructor is teaching her clinical group about laboratory blood tests. What is the major function of erythrocytes?
- A. Act as mediators for the immune system
- B. Destroy invading organisms
- C. Transportation of Oâ?? to the tissues and removal of COâ?? from the tissues
- D. Oxygenation of the brain
Correct Answer: C
Rationale: Erythrocytes (or RBCs) are flexible, anuclear (lacking a nucleus), biconcave disks covered by a thin membrane through which oxygen (Oâ??) and carbon dioxide (COâ??) pass freely. The flexibility of erythrocytes allows them to change shape as they travel through capillaries. Their major function is to transport Oâ?? to and remove COâ?? from the tissues. The RBCs are not involved in immunological functions, so choices A and B are not correct. Oxygenation of the brain is important but that is not a major function of RBCs.
The nurse is inspecting the tonsils for a client with a fever and sore throat. The nurse observes purulent exudate on the surface of the tonsils. What does this finding indicate to the nurse?
- A. Filariasis
- B. Thrush
- C. An abscess
- D. Tonsillitis
Correct Answer: D
Rationale: Purulent exudate on the surface of the tonsils suggests tonsillitis. Filariasis is also known as elephantiasis and is a consequence of a roundworm infection in which the lymphatic vessels become occluded. An abscess would not have purulent drainage on the surface unless ruptured.
A client is being treated for anemia and has a hemoglobin level of 9.6 g/dL. What does the nurse understand is the basic nutritional component of heme in hemoglobin that the client may be deficient in?
- A. Folic acid
- B. Copper
- C. Protein
- D. Iron
Correct Answer: D
Rationale: Iron is the basic nutritional component of heme in hemoglobin. Folic acid is essential for the maturation of red blood cells. Copper (minute amount) is involved in the transfer of iron from storage to plasma.
The nurse is caring for three clients who have the following blood count values: Client A has 24,500/mm?³ white blood cells (WBCs), client B has 13.4 g/dL hemoglobin, and client C has a 250,000/mm?³ platelet count. Which statement correctly describes the condition of each client?
- A. Client A has a normal WBC count, client B has a higher hemoglobin count than normal, and client C has a normal platelet count.
- B. Client A has a higher WBC count than normal, client B has a normal hemoglobin count, and client C has a normal platelet count.
- C. Client A has a higher WBC count than normal, client B has a normal hemoglobin count, and client C has a higher platelet count than normal.
- D. Client A has a lower WBC count than normal, client B has a normal hemoglobin count, and client C has a normal platelet count.
Correct Answer: B
Rationale: The normal leukocyte count is between 5000 and 10,000/mm?³. Client A has an increased number of leukocytes greater than 10,000/mm?³ and hence has leukocytosis. In adults, the normal amount of hemoglobin is 12.0 to 17.4 g/dL; therefore, client B has a normal hemoglobin count. A normal circulating platelet count is 150,000 to 350,000/mm?³ platelets; therefore, client C has a normal platelet count.