Aplastic anemia is a disorder in which the bone marrow cells that develop into mature blood cells become damaged. The damaged bone marrow cells can lead to low numbers of red blood cells, white blood cells, and/or platelets. When the cause of aplastic anemia cannot be diagnosed, the cause is likely which of the following?
Radiation exposure
An autoimmune disorder
Chemotherapy drugs
Toxins
The Correct Answer is B
A. Radiation exposure: Radiation exposure can cause aplastic anemia, but if the cause is unknown, it is less likely to be due to a specific and identifiable event like radiation exposure.
B. An autoimmune disorder: When the cause of aplastic anemia cannot be diagnosed, it is often attributed to an autoimmune disorder where the body attacks its own bone marrow cells.
C. Chemotherapy drugs: Chemotherapy drugs can cause aplastic anemia, but this cause would typically be known based on the patient's medical history.
D. Toxins: Toxins can cause aplastic anemia, but like chemotherapy drugs and radiation, this cause would generally be identifiable.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Raloxifene hydrochloride is a selective estrogen receptor modulator (SERM) that is used for the prevention and treatment of osteoporosis in postmenopausal women. It helps to prevent bone loss and reduce the risk of fractures by acting similarly to estrogen in some tissues and antagonizing estrogen in others.
B. Levothyroxine is a thyroid hormone replacement medication used to treat hypothyroidism, not osteoporosis.
C. Escitalopram oxalate is an antidepressant medication used to treat depression and anxiety disorders, not osteoporosis.
D. Calcitonin is a hormone involved in calcium regulation, and calcitonin nasal spray is sometimes used in the treatment of osteoporosis, but it is not typically the first-line treatment option.
Correct Answer is B
Explanation
A. Hemophilia B results from a deficiency in clotting factor VIII. Hemophilia B results from a deficiency in clotting factor IX. Hemophilia A results from a deficiency in clotting factor VIII.
B. Males inherit hemophilia from their mothers. Hemophilia is an X-linked recessive disorder, meaning males inherit the defective gene from their carrier mothers.
C. Females inherit hemophilia from their fathers. Females can be carriers if they inherit the
defective gene from their mother, but they generally do not inherit the disease itself from their fathers due to the X-linked recessive inheritance pattern.
D. Hemophilia is a Y linked disorder. Hemophilia is not Y-linked; it is an X-linked recessive disorder.
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