Bone marrow contains tissue that produces lymphocytes. B-lymphocytes (B-cells) mature in the bone marrow. T-lymphocytes (T-cells) mature in the thymus gland. Other blood cells such as monocytes and leukocytes are produced in the bone marrow.
However, Soma and anxiety is not one of these situations. Since the anti-anxiety effects of Soma are not very strong, you would need to take unsafe amounts to treat your anxiety. A good doctor would not prescribe Soma for your anxiety and would suggest other alternatives.
Alprazolam is used for all types of anxiety, but it's one of the few medicines prescribed for panic disorder. Most other benzodiazepines (including Alprazolam) are used primarily for generalized anxiety disorder and social anxiety disorder. Alprazolam binds to GABA receptors to produce these anxiolytic qualities.