Nokea
Which is the average lifespan of an erythrocyte?
- A. 7 days
- B. 60 days
- C. 120 days
- D. Up to several years
Correct Answer: C
Rationale: The lifespan of an RBC is 120 days. A WBC's lifespan is days to several years. Platelets live 5 to 9 days.
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Because older adults suffer from conditions such as colonic diverticula, hiatal hernia, and ulcerations that can cause occult bleeding, the nurse should assess for symptoms of which blood disorder?
- A. leukemia.
- B. iron-deficiency anemia.
- C. sickle cell anemia.
- D. polycythemia.
Correct Answer: B
Rationale: Blood loss is a major cause of iron-deficiency in adults. The major sources of chronic blood loss are from the GI and genitourinary systems.
A 23-year-old male patient with hemophilia A says, 'How can I keep my children from having hemophilia A?' Which is the most informative response?
- A. You need to select a very dependable mode of birth control.'
- B. You can only pass hemophilia B to your sons.'
- C. Your daughter may be a carrier and her children may have hemophilia A.'
- D. Your sons should have coagulation studies.'
Correct Answer: C
Rationale: Hemophilia A is an X-linked trait. Females are carriers; therefore, the patient's daughter could pass the disease to her sons.
The nurse is aware that a person with Hodgkin disease, who has two or more abnormal lymph nodes on the same side of the diaphragm and cancer extending locally from one lymph node area into a nearby organ, would be in which stage?
- A. stage I.
- B. stage II.
- C. stage III.
- D. stage IV.
Correct Answer: B
Rationale: Stage II indicates that there are two or more abnormal lymph nodes on the same side of the diaphragm and cancer that extends from a lymph node area into a nearby organ.
The spleen is a highly vascularized organ located in the left upper quadrant of the abdominal cavity. Which is the main function of the spleen?
- A. Serve as reservoir for blood.
- B. Destroy worn-out RBCs.
- C. Promote phagocytosis.
- D. Responsible for development of T lymphocytes.
- E. Continuously produce RBCs during lifetime.
Correct Answer: A,B,C
Rationale: The spleen stores 500 mL of blood, which can be released during emergencies, such as hemorrhage. The main functions of the spleen are (1) to serve as a reservoir for blood; (2) to destroy old or imperfect RBCs; and (3) to remove bacteria by phagocytosis (engulfing and digesting).
The typical medical treatment of polycythemia vera involves repeated phlebotomies for which intended benefit?
- A. stimulate bone marrow.
- B. Reduce blood viscosity
- C. increase hemoglobin.
- D. reduce symptoms of gout.
Correct Answer: B
Rationale: Repeated phlebotomy decreases blood viscosity and prevent blood clots.