A-LevelBiologyImmunity9700/12 · May/June 2010 · Q341 Mark
What is a difference between T-lymphocytes and B-lymphocytes in the immune system?
AT-lymphocytes: do not form plasma cells; B-lymphocytes: form plasma cells which secrete antibodies into the blood stream
BT-lymphocytes: do not stimulate macrophages to carry out phagocytosis; B-lymphocytes: stimulate macrophages to carry out phagocytosis
CT-lymphocytes: formed from cells in the thymus; B-lymphocytes: formed from bone marrow cells
DT-lymphocytes: produce memory cells; B-lymphocytes: do not produce memory cells
✓ Correct answer
A: T-lymphocytes: do not form plasma cells; B-lymphocytes: form plasma cells which secrete antibodies into the blood stream
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