A defect in which of the following proteins blocks B-cell development at the pre-B-cell stage, resulting in almost no circulating antibodies in individuals with this defect?
a. IL-7 receptor
b. terminal deoxynucleotidyltransferase (TdT)
c. Pax-5
d. Bruton's tyrosine kinase (Btk)
e. CD19.
D
You might also like to view...
The physiological reasoning behind giving acyclovir, an antiviral medication, to a client diagnosed with genital herpes would include the fact that these drugs:
A) Attack the cell wall and totally destroy the virus, thus curing the client B) Interfere with viral DNA replication, which can decrease the frequency of recurrences C) Will prevent the organism from developing a resistance to the treatment protocols D) Can be obtained without a prescription and usually applied topically
The primary accented syllable in the pronunciation of the medical word hallucination (hah-loo-sih-nay-shun) is ________
A) hah B) loo C) sih D) nay
When lost fluid is not replaced adequately, __________ can result.
A. heat stroke B. hypothermia C. dehydration D. emphysema
What percentage of the oxygen carried in the blood is bonded to hemoglobin?
a. 15 b. 45 c. 59 d. 99