Question

a. donor match located
b. a sample of donor bone marrow containing healthy stem cells is introduced into the patients bloodstream
c. patients existing bone marrow and abnormal leukocytes are killed using a combination of chemotherapy and radiation
d. donor stem cells will migrate to patients bone marrow and begin producing healthy leukocytes

a a, c, d, b

b a, b, c, d

c c, a, b, d

d

Explanation:

The question asks for the correct order of bone marrow transplant steps. First, a donor match must be found (A). Then, the patient’s abnormal bone marrow is destroyed with chemo/radiation (C). Next, donor stem cells are introduced into the bloodstream (B). Finally, the cells migrate to the marrow and produce healthy leukocytes (D). The order A, C, B, D is the correct sequence.

Answer:

A, C, B, D