Nokea
Undifferentiated cells that migrate to the thymus gland develop into which of the following?
- A. A lymphocytes
- B. D lymphocytes
- C. T lymphocytes
- D. S lymphocytes
Correct Answer: C
Rationale: The thymus gland is lymphatic tissue in the upper chest that contains undifferentiated stem cells released from bone marrow. Once the undifferentiated cells migrate to the thymus gland, they develop into T lymphocytes because they are thymus derived. The other options are distractors for this question.
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Why would it be important for the nurse to obtain information regarding the dietary history of a client with a possible abnormality of the hematopoietic or lymphatic system?
- A. It could determine if the illness is self-induced by nutritional starvation.
- B. If the client has impaired protein intake, it will cause diseases of the hematopoietic system.
- C. Altered nutrition is the cause of abnormalities of the hematopoietic and lymphatic system.
- D. Compromised nutrition interferes with production of blood cells and hemoglobin.
Correct Answer: D
Rationale: The nurse obtains a dietary history because compromised nutrition interferes with the production of blood cells and hemoglobin. The history cannot determine if the illness is self-induced by starvation. Nutritional deficiencies do not cause diseases of the hematopoietic system and lymphatic system.
A student nurse is having difficulty understanding the function of globulins. What information can the client provide to the student regarding the function of globulins?
- A. Immunologic agents
- B. Destruction of invading organisms
- C. Precursors to clot formation
- D. Transport of oxygen to the tissues
Correct Answer: A
Rationale: Globulins function primarily as immunologic agents; they prevent or modify some types of infectious diseases. Globulins do not destroy invading organisms, participate in clot formation, or transport oxygen to the tissues.
A client is brought to the emergency department with suspected bleeding esophageal varices. Which hemoglobin level should the nurse immediately report to the physician?
- A. 13.0 g/dL
- B. 10.2 g/dL
- C. 5.0 g/dL
- D. 11.4 g/dL
Correct Answer: C
Rationale: The nurse should immediately report a 5.0 g/dL, which is a critical low level. A 13.0 g/dL is a normal level, 11.4 is slightly low, and 10.2 is low.
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.
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.