Receptor editing occurs _____. (Select all that apply.)
a. in the bone marrow
b. after encounter with foreign antigen in secondary lymphoid organs
c. in mature B cells
d. to establish self-tolerance of the B-cell repertoire
e. to express an excess of IgM over IgD on the surface of mature B cells.
A,D
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Which stage of urine production involves the removal of substances from the bloodstream?
A) reabsorption B) excretion C) filtration D) secretion
The central nervous system consists of the ________
A) brain and skull B) peripheral nerves and dermatomes C) cranial nerves and spinal nerves D) brain and spinal cord
Ordinances are laws enacted by
A. regulatory agencies. B. regional trading blocs. C. local governments. D. states.
Ketosis is a condition of acidosis resulting from
A. excessive fat metabolism. B. low blood glucose. C. high insulin levels. D. eating sugar.