Select your answer:

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Immunology › ViewThrough which of the following ways do B cells acquire/interact with antigen in the lymph nodes and spleen?
A. soluble antigen acquired from lymphatic circulation by dendritic cells
B. free antigen transported to lymph node via lymphatic vessels
C. follicular dendritic cells (FDCs) concentrate antigen for selection and differentiation
D. all of the above
E. none of the above
Your Body › View
All living things obtain and use energy to survive.
A. TRUE
B. FALSE