A 55-year-old male presents with symptoms that include weakness, loss of appetite, and anemia. Immunofixation electrophoresis reveals a heavy IgM band. Which of the following is the most likely diagnosis?
A) SCID
B) multiple myeloma
C) Waldenström's macroglobulinemia
D) DiGeorge syndrome
Ans: C) Waldenström's macroglobulinemia
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In the dark, the Na+ channels in the outer segments of rod cells are
A. open. B. closed. C. primarily affected by inhibitory neurotransmitter input. D. important in making the cell hyperpolarized in this resting state.
The leeward side of a mountain typically forms a ________ type of biome
a. desert b. rainforest c. coniferous forest d. grasslands e. tundra
Which of the following is NOT a correct match of preservatives/ transport media and specimen for proper specimen collection for bacterial culture?
A. Boric acid- Urine culture B. Stuart's media- wound swab C. Cary-Blair media- stool D. Formalin-tissue culture
Figure on p. 737
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Use the figure above showing the process of gastrulation to answer the following question.
The letter "A" in the accompanying figure represents ____.
A. ectoderm B. endoderm C. mesoderm D. neural plate E. yolk